Multi-Function Display

Transcription

1 Building Automation Industrial Automation Systems User Manual MFD-Titan Multi-Function Display 06/04 AWB GB A Tink future. Switc to green.

2 All brand and product names are trademarks or registered trademarks of te owner concerned. 1 st publised 2003, edition date 06/03 2 nd edition 06/2004 See revision protocol in te About tis manual capter Moeller GmbH, Bonn Autor: Editor: Translator: Dieter Bauerfeind Heidrun Riege Terence Osborn All rigts reserved, including tose of te translation. No part of tis manual may be reproduced in any form (printed, potocopy, microfilm or any oter process) or processed, duplicated or distributed by means of electronic systems witout written permission of Moeller GmbH, Bonn. Subject to alteration witout notice.

3 Warning! Dangerous electrical voltage! Before commencing te installation Disconnect te power supply of te device. Ensure tat devices cannot be accidentally restarted. Verify isolation from te supply. Eart and sort circuit. Cover or enclose neigbouring units tat are live. Follow te engineering instructions (AWA) of te device concerned. Only suitably qualified personnel in accordance wit EN /-2 (VDE 0105 Part 100) may work on tis device/system. Before installation and before toucing te device ensure tat you are free of electrostatic carge. Te functional eart (FE) must be connected to te protective eart (PE) or to te potential equalisation. Te system installer is responsible for implementing tis connection. Connecting cables and signal lines sould be installed so tat inductive or capacitive interference does not impair te automation functions. Install automation devices and related operating elements in suc a way tat tey are well protected against unintentional operation. Suitable safety ardware and software measures sould be implemented for te I/O interface so tat a line or wire breakage on te signal side does not result in undefined states in te automation devices. Ensure a reliable electrical isolation of te low voltage for te 24 volt supply. Only use power supply units complying wit IEC (VDE 0100 Part 410) or HD S2. Deviations of te mains voltage from te rated value must not exceed te tolerance limits given in te specifications, oterwise tis may cause malfunction and dangerous operation. Emergency stop devices complying wit IEC/EN must be effective in all operating modes of te automation devices. Unlatcing te emergency-stop devices must not cause restart. Devices tat are designed for mounting in ousings or control cabinets must only be operated and controlled after tey ave been installed wit te ousing closed. Desktop or portable units must only be operated and controlled in enclosed ousings. Moeller GmbH Safety instructions I

4 Measures sould be taken to ensure te proper restart of programs interrupted after a voltage dip or failure. Tis sould not cause dangerous operating states even for a sort time. If necessary, emergencystop devices sould be implemented. Werever faults in te automation system may cause damage to persons or property, external measures must be implemented to ensure a safe operating state in te event of a fault or malfunction (for example, by means of separate limit switces, mecanical interlocks etc.). II

5 06/04 AWB D Contents About Tis Manual 9 Device designation 9 Writing conventions 9 List of revisions 10 1 MFD-Titan 13 Target readersip 13 Proper use 13 Improper use 13 Overview 14 Device overview 16 MFD devices at a glance 16 Type references for te MFD-Titan 18 MFD operation 18 Buttons 18 Moving troug menus and coosing values 19 Selecting main and system menu 20 MFD-Titan Status display 20 Status display for local expansion 21 MFD-Titan advanced Status display 21 MFD-Titan LED display 21 Menu structure 23 Selecting or toggling between menu items 29 Cursor display 30 Setting values 30 2 Installation 31 Mounting 31 Connecting te expansion unit 49 Terminals 49 Tool for cage clamp terminals 49 Connection cross-sections of te MFD cage clamp terminal cables 49 Tool for slot-ead screws for easy expansion unit 49 Connection cross-sections of screw terminal cables 49 1

6 Contents 06/04 AWB D Network cables and plugs 50 Connecting te power supply 50 Cable protection 54 Connecting te inputs 55 Connecting te AC inputs 55 Connecting MFD-DC inputs 60 Connecting te outputs 66 Connecting relay outputs 67 MFD-R.. 67 EASY6..-..RE.. 68 EASY2..-RE 68 Connecting transistor outputs 69 MFD-T.. 69 EASY6..-DC-TE 69 Connecting analog outputs 71 Connecting servo valves 72 Setpoint entry for a drive 72 Connecting te NET network 73 Accessories 73 Cable lengt and cross-sections 74 Plugging and unplugging network cables 76 Connecting te serial interface 78 Expanding inputs/outputs 81 Local expansion 81 Remote expansion 83 3 Commissioning 85 Switcing on 85 Setting te menu language 85 MFD operating modes 86 Creating your first circuit diagram 87 Starting point Status display 89 Circuit diagram display 90 From te first contact to te output coil 91 Wiring 92 Testing te circuit diagram 94 Deleting te circuit diagram 97 Fast circuit diagram entry 97 2

7 06/04 AWB D Contents Configuring an easy-net network 98 Entering te network station number 99 Entering network stations 100 Configuring an easy-net network 101 Canging te easy-net network configuration 102 Displaying te Status display of oter stations 103 Configuring te interface for te COM-LINK mode 104 Setting up te COM-LINK 105 Terminal mode 109 Terminal mode Wiring wit MFD-Titan 119 MFD-Titan operation 119 Buttons for drawing circuit diagrams and function block usage 119 Operating principles 120 Usable relays and function blocks (coils) 128 Markers, analog operands 131 Number formats 135 Circuit diagram display 135 Saving and loading programs 137 Working wit contacts and relays 138 Creating and modifying connections 141 Inserting and deleting a rung 143 Saving circuit diagrams 144 Aborting circuit diagram entry 144 Searcing for contacts and coils 144 Go to a rung 145 Deleting te rung 145 Switcing via te cursor buttons 146 Cecking te circuit diagram 147 Function block editor 148 Cecking function blocks 152 Coil functions 153 Function blocks 158 Analog value comparator/tresold value switc 160 Aritmetic function block 163 3

8 Contents 06/04 AWB D Data block comparator 167 Data block transfer 174 Boolean operation 185 Counters 188 Hig-speed counters 194 Frequency counters 195 Hig-speed counters 199 Hig-speed incremental encoder counters 205 Comparators 210 Text output function block 212 Data function block 213 PID controller 215 Signal smooting filter 221 GET, fetc a value from te network 224 Seven-day time switc 226 Year time switc 231 Value scaling 235 Jumps 239 Master reset 242 Numerical converters 243 Operating ours counter 249 PUT, send a value onto te network 250 Pulse widt modulation 252 Setting date/time 255 Set cycle time 256 Timing relay 259 Value limitation 272 Example wit timing relay and counter function block Visualization wit MFD-Titan 279 Screens 279 Memory division 280 Western European caracter table 281 Screen overview 283 Screen editor 285 Static text 285 Bit display 289 Date and time 293 Bitmap 296

9 06/04 AWB D Contents Numerical value 302 Example numerical value: 304 Value entry 313 Message text 320 Button editor 333 Select an operable screen element 333 Display backligt 333 Screen cange 333 Password logout 334 Set variable to fixed value 334 Increment variable 334 Decrement variable 334 Cangeover relay easy-net Network, COM-LINK Serial Connection 335 Introduction to easy-net 335 easy-net network topologies, addressing and functions 336 Loop troug te unit wiring metod 336 T connector and spur line 336 Position and addressing of te operands via easy-net 338 Possible write and read autorisation in te network 340 Configuration of te easy-net network 341 Station number 341 Transmission speed 341 Pause time, canging te write repetition rate manually 342 Automatic cange of te RUN and STOP mode 343 Input/output device (REMOTE IO) configuration 344 Station message types 345 Transfer beaviour 345 Signs of life of te individual stations and diagnostics 346 5

10 Contents 06/04 AWB D Introduction to COM-LINK 350 Topology 351 Configuration of te COM-LINK MFD Settings 359 Password protection 359 Password setup 360 Selecting te scope of te password 361 Activating te password 362 Unlocking MFD 363 Canging te menu language 366 Canging parameters 367 Adjustable parameters for function blocks 368 Setting date, time and dayligt saving time 369 Canging between winter/summer time (DST) 370 Activating input delay (debounce) 372 Deactivating debounce (input delay) 372 Activating and deactivating te P buttons 373 Activating te P buttons 373 Deactivating te P buttons 374 Startup beaviour 374 Setting te startup beaviour 374 Beaviour wen te circuit diagram is deleted 375 Beaviour during upload/download to card or PC 375 Possible faults 376 Card startup beaviour 376 Terminal mode 377 Setting LCD contrast and backligt 378 Retention 380 Requirements 381 Setting retentive beaviour 381 Deleting ranges 382 Deleting retentive actual values of markers and function blocks 382 Transferring retentive beaviour 383 Displaying device information 384 6

11 06/04 AWB D Contents 8 Inside MFD 387 MFD Program cycle 387 How MFD evaluates te ig-speed counters CF, CH and CI 391 Memory management of te MFD-Titan 391 Delay times for inputs and outputs 392 Delay times for te MFD inputs 393 Monitoring of sort-circuit/overload wit EASY..-D.-T Expanding MFD-Titan 397 How is an expansion unit recognised? 397 Transfer beaviour 398 Function monitoring of expansion units 398 QA analog output 400 Loading and saving programs 400 MFD witout display and keypad 400 Interface 401 Memory card 401 EASY-SOFT-PRO 406 Device version 408 Appendix 409 Tecnical data 409 General 409 CPU, real-time clock/timing relay/memory 417 Transistor outputs 424 Analog output 427 easy-net network 428 List of te function blocks 430 Function blocks 430 Function block coils 431 Function block output (operands) 434 Oter operands 434 Memory requirement 435 Index 437 7

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13 06/04 AWB GB About Tis Manual Tis manual describes te installation, commissioning and programming (circuit diagram generation) of te MFD-Titan control relay. A specialist knowledge of electrical engineering is needed for commissioning and creating circuit diagrams. Wen active components suc as motors or pressure cylinders are controlled, parts of te system can be damaged and persons put at risk if te MFD device is connected or programmed incorrectly. Device designation Tis manual uses te following abbreviated designations for different device models: MFD-Titan MFD easy-ac for EASY618-AC-RC easy-dc for EASY6..-DC-.E Writing conventions Symbols used in tis manual ave te following meanings: X Indicates actions to be taken. Attention! Warns of te possibility of ligt damage. i Caution! Warns of te possibility of serious damage and sligt injury. j Warning! Warns of te possibility of substantial damage, serious injury or deat. 9

14 About Tis Manual 06/04 AWB GB Indicates interesting tips and additional information For greater clarity, te name of te current capter is sown in te eader of te left-and page and te name of te current section in te eader of te rigt-and page. Tis does not apply to pages at te start of a capter and empty pages at te end of a capter. List of revisions Edition Page Topic New Canged Removed 06/04 9 Device designation j 30 Section Setting values j 64 Section Temperature sensor, j brigtness sensor, 20 ma sensor 73 Connection cable: j 74 Section Cable lengt and crosssections j 117 Initialise display j 131 Table 8 j 132 Section Composition of te markers j 194 Hig-speed counters j 203 Figure 105 j 226 Section Function of te GET function j block 233 Section Function of te year time j switc function block 250 Section Accuracy j 254 Section Function of te pulse widt modulation function block j 10

15 06/04 AWB GB List of revisions Edition Page Topic New Canged Removed 06/ Section Time range j 262 Section Variable setpoint values j 265 Figure 101 j 266, 267 Figure 135 and Figure 136 j 279 Capter 5 j 365 Section Password incorrect or no j longer known 391 Section Memory management of te j MFD-Titan 401 Section Memory card j 406 Section EASY-SOFT-PRO j 412 Grapic Dimensions of te MFD-80.. j display/operating unit 413 Grapic Dimensions of te MFD-CP8.. j power supply/cpu module. 414 Climatic ambient conditions j 414 Ambient mecanical conditions j 415 Electromagnetic compatibility (EMC) j 415 Dielectric strengt j 416 Operating buttons, input current j 11

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17 06/04 AWB GB 1 MFD-Titan Target readersip MFD must only be installed and wired up by trained electricians or oter persons familiar wit te installation of electrical equipment. A specialist knowledge of electrical engineering is needed for commissioning and creating circuit diagrams. Wen controlling active components suc as motors or pressure cylinders, parts of te system can be damaged and persons put at risk if MFD is connected or programmed incorrectly. Proper use MFD is a programmable device tat provides HMI, switcing, closed-loop and open-loop control functions, and can be used to replace relay and contactor controls as well as being used as an MFD device. MFD must be properly installed before use. Te display and operating unit of te MFD is protected to IP65 and does not normally require any special ousing protection. Te rear MFD units are designed as mounting units and must be installed in an enclosure, control cabinet or a service distribution board. Bot te power feed and te signal terminals must be laid and covered so as to prevent accidental contact. Te installation must comply wit regulations for electromagnetic compatibility (EMC). Te power up of te MFD must not cause any azards arising from activated devices, suc as unexpected motor startups or power ups. Improper use MFD sould not be used as a substitute for safety-related controls suc as burner or crane controls, emergency-stop or two-and safety controls. 13

18 MFD-Titan 06/04 AWB GB Overview MFD-Titan is an electronic HMI unit and control relay wit te following features: Logic functions, Timing relay and counter functions, Time switc functions, Aritmetic functions, PID controllers, Operator and display functions. MFD-Titan is a display, HMI, control and input device in one. Wit MFD-Titan you can create solutions for domestic applications as well as for tasks in macine and plant construction. MFD-Titan is a modular and flexible device. Te integral easy-net network enables te connection of up to eigt easy-net stations to form a single control system. Eac easy-net station can contain a program. Tis allows te design of systems using ig-speed controllers wit decentralised intelligence. In Terminal mode, te MFD can be used to control any device in te network and display data from it, regardless of weter it is an easy800 or an MFD. In tis mode, te MFD makes its keypad and display available to te oter device for use. Two devices, MFD wit easy800 or MFD, can be connected simply via te serial interfaces. Circuit diagrams are connected up using ladder diagrams, and eac element is entered directly via te MFD display. For example, you can: connect make and break contacts in series and in parallel switc output relays and auxiliary contacts, define outputs as coils, impulse relays, rising or falling edge-triggered relays or as latcing relays, select timing relays wit different functions: on-delayed, on-delayed wit random switcing, 14

19 06/04 AWB GB Overview off-delayed, off-delayed wit random switcing, on and off delayed, on and off delayed wit random switcing, single pulse, syncronous flasing, asyncronous flasing. use up and down counters, count ig-speed signals: up and down counters wit upper and lower limit values, preset, frequency counters, ig-speed counters, count incremental encoder values. compare values, display grapics, texts, variables, enter setpoints, display flasing values and grapics, cange and replace grapics and texts by pusbutton, process additional inputs and outputs, use 7-day and year time switces, count operating ours (operating ours counter), communicate via te integrated easy-net network, set up point-to-point communication via te serial interface, provide closed-loop control wit P, PI and PID controllers, scale aritmetic values, output manipulated variables as pulse-widt modulated signals, run aritmetic functions: add, subtract, multiply, divide. 15

20 MFD-Titan 06/04 AWB GB track te flow of current in te circuit diagram, load, save and password-protect circuit diagrams. If you prefer to wire up MFD-Titan from a PC, ten use EASY-SOFT-PRO. EASY-SOFT-PRO allows you to create and test your circuit diagram on te PC. All display and operator functions on te MFD device are created exclusively using te EASY-SOFT-PRO software. EASY-SOFT-PRO is also used to print out your circuit diagram in DIN, ANSI or easy format. Device overview MFD devices at a glance Display and operating unit a b c d i g f e Figure 1: Overview of te display and operating unit a DEL button b Grapic display c ALT button d LEDs for signalling e Mode button f Rigt, down cursor buttons g OK button Left, up cursor buttons i ESC button 16

21 06/04 AWB GB Device overview Power supply and CPU a b f e c d Figure 2: Device overview of power supply and CPU a Power supply b easy-net terminals c EASY-LINK terminal d Interface for memory card, PC and point-to-point connection e Power supply / operating mode LED f easy-net LED Inputs/outputs a b c Figure 3: Device overview of inputs/outputs a Inputs b Analog output (optional) c Outputs 17

22 MFD-Titan 06/04 AWB GB MFD - xxx x - x x - x x Type references for te MFD-Titan Additional functions Equipment B = Operator buttons ME = Open-loop control, closed-loop control; NT = Openloop control, closed-loop control, easy-net Device function Number = display and enclosure in mm CP8 = Power supply and CPU rating 8 R = relay outputs, T = Transistor outputs A = Analog output Number = Number of inputs and outputs Multi-function display MFD operation Buttons DEL ESC OK ALT * DEL: Delete object in circuit diagram ALT: Special functions in circuit-diagram, Status display Cursor buttons ú í Í Ú: Move cursor Select menu items Set contact numbers, contacts and values OK: Next menu level, Save your entry ESC: Previous menu level, Cancel *: Toggle between visualization display and Status display close Terminal mode In visualization applications, te operating unit can be used for oter functions tan te ones stated above. In tis case te buttons are assigned te function selected in te application. Te standard button functions are only restored wen you leave te application. 18

23 06/04 AWB GB MFD operation Moving troug menus and coosing values DEL and ALT Sow System menu OK Go to next menu level Select menu item Activate, modify, save your entry ESC Return to last menu level Cancel your entry since te last OK DEL and ESC Í Ú Cange menu item Cange value ú í Cange place Function of P buttons: ú í Input P1, Input P3, Reset te MFD display Í Ú Input P2 Input P4 19

24 MFD-Titan 06/04 AWB GB Selecting main and system menu Status display I P- R.2 MO 02:00 RS Q..34. STOP MO S DEL OK ESC ESC and ALT No password Current selection flases in te MFD menu PROGRAM... STOPå RUN PARAMETERS SET CLOCK... 1st menu level Main menu Date display SECURITY... SYSTEM... MENU LANGUAGE CONFIGURATOR... 1st menu level System menu I P- MO 11:50 Q STOP ALT I P- MO Q STOP MFD-Titan Status display Inputs Weekday/Time Outputs I * P- MO 02:00 Q STOP On: 1, 2, 3, 4/Off: Display operating mode, Terminal mode or Weekday/Date RUN/STOP/BUSY mode 20

25 06/04 AWB GB MFD operation Status display for local expansion Inputs Expansion Weekday/Time Outputs R RS AC P- MO 10:42 S STOP AC expansion ok/p buttons or Weekday/Date On: 1, 2, 3, 4/Off: RS = Expansion functioning correctly MFD-Titan advanced Status display Retention/debounce/ easy-net station I RE I NT1 AC P- MO 14:42 T Q RUN AC expansion ok/p buttons Startup beaviour RE : Retention switced on I : Debounce switced on NT1: easy-net station wit station address COM Te COM connection is active AC : AC expansion functioning correctly DC : DC expansion functioning correctly GW : Bus coupling module detected GW flases: Only easy200-easy detected. I/O expansion not detected. : Wen te power supply is switced on, MFD switces to STOP mode ST MFD-Titan LED display MFD-Titan features two LEDs on te back of te MFD-CP... power supply /CPU device. Tese indicate te status of te power supply (POW) and te RUN or STOP operating mode (a Fig. 1, Page 16). 21

26 MFD-Titan 06/04 AWB GB Table 1: Power supply/run-stop mode LED LED OFF No power supply LED continuously lit Power supply present, STOP mode LED flasing Power supply present, RUN mode Table 2: LED OFF LED continuously lit LED flasing easy-net LED (easy-net) Te front of te MFD-80.. device as a green LED and a red LED. Tese can be used in your visualization application as ligt indicators. Te following applies to Terminal mode: Green LED Table 3: LED OFF LED continuously lit LED flasing Red LED Table 4: LED OFF LED continuously lit Power supply/run-stop mode LED Fault on te easy-net easy-net not operational, fault, in configuration easy-net is initialised and no station as been detected. easy-net operating fault-free No power supply Power supply present, STOP mode Power supply present, RUN mode Operation correct easy-net remote device faulty 22

27 06/04 AWB GB MFD operation Menu structure Main menu witout password protection X You access te main menu by pressing OK. Main menu STOP: Circuit diagram display RUN: Power flow display PROGRAM... Æ STOP å RUN PARAMETERS SET CLOCK æ TERMINAL MODE.. PROGRAM... DELETE PROGRAM CARD CIRCUIT DIAGRAM FUNCTION RELAYS Parameter display Circuit diagram SAVE Æ æ CANCEL Parameters Æ SEARCH GO TO Æ æ Æ æ CIRCUIT DIAGRAM FUNCTION RELAYS Function block editor SAVE Æ æ CANCEL æ æ SEARCH Æ æ GO TO Æ æ PROGRAM... DELETE PROGRAM CARD... DELETE? 23

28 MFD-Titan 06/04 AWB GB Main menu PROGRAM... DELETE PROGRAM CARD... DEVICE-CARD CARD-DEVICE DELETE CARD? REPLACE? PROGRAM... STOP RUN å PARAMETERS SET CLOCK... TERMINAL MODE PROGRAM... STOP RUN å PARAMETERS SET CLOCK... TERMINAL MODE Æ æ Æ æ Parameter display Parameters DEVICE-CARD CARD-DEVICE DELETE CARD? DEVICE-CARD CARD-DEVICE DELETE CARD? REPLACE? DELETE? PROGRAM... STOP RUN å PARAMETERS SET CLOCK... TERMINAL MODE Æ æ SET CLOCK DST SETTING Display for date and time setting HH:MM --:-- DD.MM YEAR HH:MM 14:23 DD.MM YEAR 2001 SET CLOCK DST SETTING NONE å MANUAL å EU å GB å US å SUMMERTIME START DD.MM : SUMMERTIME END DD.MM : Only one selection is possible. PROGRAM... STOP RUN å Æ PARAMETERS SET CLOCK... TERMINAL MODE..æ STATION ID: 0 START MODE Connection establisment in progress.. 24

29 06/04 AWB GB MFD operation Main menu wit password protection Main menu PASSWORD... STOP RUN å PARAMETERS SET CLOCK... Æ æ Unlocking MFD Password entry Password Status display Four wrong entries (if enabled) Correct entry DELETE ALL PASSWORD... RUN MFD-Titan system menu X Te System menu is accessed by simultaneously pressing DEL and ALT. System menu Password Setup Password entry SECURITY... SYSTEM... MENU LANGUAGE CONFIGURATOR... PASSWORD... RANGE... ENTER PASSWORD ACTIVATE PW CHANGE PW Cange/ delete password ACTIVATE PW CHANGE PW ENTER PASSWORD ACTIVATE PW CHANGE PW PASSWORD... RANGE... PROGRAM å Æ PARAMETERS TIME OPERATING MODE æ INTERFACE DELETE FUNCT. PROGRAM å Æ PARAMETERS å TIME å OPERATING MODEåæ INTERFACE å DELETE FUNCT. å 25

30 MFD-Titan 06/04 AWB GB System menu SECURITY... SYSTEM... MENU LANGUAGE CONFIGURATOR... DEBOUNCE å Æ P BUTTONS RUN MODE CARD MODE æ TERMINAL MODE DISPLAY... RETENTION... INFORMATION... DEBOUNCE å Æ P BUTTONS å RUN MODE å CARD MODE å æ TERMINAL MODE å DISPLAY... RETENTION... INFORMATION... DEBOUNCE å P BUTTONS RUN MODE Æ CARD MODE TERMINAL MODE DISPLAY æ RETENTION... INFORMATION... Æ CONTRAST: 0 LIGHTING: 75% Retention only in STOP mode DEBOUNCE å P BUTTONS RUN MODE CARD MODE Æ TERMINAL MODE DISPLAY... RETENTION... æ MB -- -> MB -- Æ INFORMATION... C -- -> C -- CH -- -> CH -- DEBOUNCE P BUTTONS RUN MODE å B: 200 æ CI -- -> CI -- DB -- -> DB -- T -- -> T -- CARD MODE TERMINAL MODE Æ DISPLAY... RETENTION... INFORMATION... æ DC TCA LCD NET OS : CRC:

31 06/04 AWB GB MFD operation System menu SECURITY... SYSTEM... MENU LANGUAGE CONFIGURATOR... ENGLISH DEUTSCH å FRANCAIS ESPANOL ITALIANO PORTUGUES NEDERLANDS SVENSKA POLSKI TURKCE Æ æ Only one selection is possible. SECURITY... SYSTEM... MENU LANGUAGE CONFIGURATOR... NET... COM... LINK... Te oter menus of NET and COM are only sown in STOP mode NET PARAMETERS... STATIONS... CONFIGURE... NET PARAMETERS... STATIONS... CONFIGURE... NET-ID : Æ BAUDRATE: KB BUSDELAY: SEND IO: æ REMOTE RUN REMOTE IO NET-ID : 01 Æ BAUDRATE: 1000KB BUSDELAY: 08 SEND IO: å æ REMOTE RUN å REMOTE IO å 27

32 MFD-Titan 06/04 AWB GB System menu NET PARAMETERS... STATIONS... CONFIGURATOR Æ æ Tis list is only created in Station 1. Tis list only appears if station 1 as been selected. NET PARAMETERS... STATIONS... CONFIGURATOR... CONFIGURE? SAVE Æ æ CANCEL Æ æ CONFIGURATION IN PROGRESS. Fault scenario wit ID conflict. Fault scenario wit network fault. ERR: ID CONFLICT CONFIGURATION CONFIGURATION? ERR: TIME OUT 28

33 06/04 AWB GB MFD operation System menu NET... COM... CONFIGURE... BAUDRATE: 9600B COM-LINK REMOTE MARKER... BAUDRATE:19200B COM-LINK å REMOTE MARKER... BAUDRATE:19200B COM-LINK å REMOTE MARKER... READ: 1MD00 WRITE: 1MD00 1MD00 1MD00 Tis menu only appears if COM-LINK was selected. Selecting or toggling between menu items PROGRAM... STOP PARAMETERS SET CLOCK... Cursor Í Ú OK Select or switc 29

34 MFD-Titan 06/04 AWB GB Cursor display HH:MM '4:23 DD.MM YEAR 2003 Te cursor flases. Full cursor Ê/: Move cursor wit ú í, in circuit diagram also wit Í Ú HH:MM 14:23 DD.MM YEAR 2003 Value M/ M Cange position wit ú í Cange values wit Í Ú Flasing values/menus are sown in grey in tis manual. Setting values HH:MM 14:23 DD.MM YEAR 2002 Cange value Í Ú Select cursor position in value ú í Cange value at position Í Ú Values Positions Value at OK ESC Store entries Retain previous value 30

35 06/04 AWB GB 2 Installation Te MFD must only be installed and wired up by qualified electricians or oter persons familiar wit te installation of electrical equipment. Danger of electric sock! Never carry out electrical work on te device wile te power supply is switced on. Always follow te safety rules: Switc off and isolate, Ensure tat te device is no longer live, Secure against reclosing, Sort-circuit and ground, Cover adjacent live parts. Te MFD is installed in te following order: Mounting, Wiring up te inputs, Wiring up te outputs, Wiring up te NET network (if required), Setting up te serial interface (if required), Connecting te power supply. Mounting Install te display/operating unit of te MFD in te front of a control cabinet, a service distribution board, operator panel or in an enclosure. Install te power supply/cpu module and te input/output module so tat all te terminals are protected against direct contact, liquids and dust during operation. Wen using te MFD witout a display/operating unit, snap it onto a IEC/EN top-at rail or fix it in place using fixing brackets. Te MFD can be mounted eiter vertically or orizontally. 31

36 Installation 06/04 AWB GB Wen using te MFD wit expansion units, connect te expansion concerned before mounting (see a page 49). For ease of wiring, leave a gap of at least 3 cm between te MFD terminals and te wall or adjacent devices Figure 4: Clearances to te MFD Fitting te protective membrane For special applications suc as in te food industry, te operating unit must be protected against te ingress of dust, liquids etc. For tis use te specially designed protective membrane. Fit te protective membrane before mounting te display/ operating unit. 32

37 06/04 AWB GB Mounting b Figure 5: Fitting te protective membrane a Protective membrane b Display/operating unit X Place te protective membrane over te display/operating unit. a Caution! Ensure tat te membrane fits snugly in te groove of te display/operating unit. Oterwise a proper seal cannot be guaranteed and particles may enter underneat te membrane. Tis may cause malfunctions in te keypad. In food industry applications, tere is te risk of bacteria building up underneat te membrane. 33

38 Installation 06/04 AWB GB Figure 6: Correct position of te protective membrane If te protective membrane as to be replaced, te display and te operating unit ave to be removed. Replace te membrane and refit te device. Mounting te protective cover Te protective cover is provided for using te device in aggressive environments. Tis protects te display and te operating unit against mecanical damage or destruction. Protection to IP65 is maintained. Te protective cover can be opened so tat te operating unit can be used. Te protective cover can be closed wit a sealing facility to provide protection against unautorised operation. Before mounting te display/operating unit, fit te protective cover. 34

39 06/04 AWB GB Mounting Figure 7: Removing te front frame X Remove te front frame as sown in te figure. Te protective cover can be mounted in two different positions. Coose te position tat is most suitable for te application at and and your requirements. Figure 8: Position of te protective cover 35

40 Installation 06/04 AWB GB Figure 9: Mounting te protective cover X Mount te protective cover as sown in te figure. Sealing te protective cover Figure 10: Sealing te protective cover Te grip andle of te protective cover is provided wit oles tat can be used in any mounting position. You can fit a wire or similar material troug tese oles in order to seal te cover. If te wire is provided wit a lead seal, te cover is sealed. Te cover can ten only be opened by breaking te seal or te wire. 36

41 06/04 AWB GB Mounting Mounting te display/operating unit, front mounting 22.5 Figure 11: Drill oles for te MFD 30 X Drill and punc out two 22.5 mm diameter oles. Te diameter is te same as is normally required for control circuit devices. Observe te following tecnical requirements: Te ole spacing is 30 mm. Te maximum tickness of te front plate for mounting te power supply/cpu module must not be more tan 6 mm. Te maximum tickness of te front plate for mounting an expansion unit wit a top-at rail in addition to te power supply/cpu module must not be more tan 4 mm. Leave enoug space at te side for te power supply/ CPU module, and if necessary, te expansion unit. In order to ensure protection to IP65, te surface of te mounting front must be even and smoot. 37

42 Installation 06/04 AWB GB Figure 12: Mounting te display/operating unit Te protective membrane or te protective cover must be fitted. X Fit te display/operating unit in te punced fixing oles. 38

43 06/04 AWB GB Mounting 2 x Figure 13: Screw fastening te display/operating unit X Screw fasten te display/operating unit. Te tigtening torque must be between 1.2 and 2 Nm Ensure tat te correct torque is used. If te tigtening torque is too low or ig, tis may impair te seal. Figure 14: Mounting te display/operating unit, front mounting Use te combination box spanner wit te designation M22-MS. 39

44 Installation 06/04 AWB GB Removing te display/operating unit, front mounting X Unscrew te fixing element and remove te display/ operating unit. Mounting te power supply/cpu module If you wis to add expansion units to te power supply/cpu module, te top-at rail must be fitted beforeand. Fitting te top-at rail Ensure tat te cutout of te top-at rail was prepared for te fixing safts according to te specified dimensions g Figure 15: Top-at rail wit cutout Te two fixing safts of te display/operating unit are designed for a 2 space unit expansion device. If you wis to fit wider expansion units, te top-at rail must be supported at a tird support point. Tis tird support point sould be located in te area 216 mm from te end of te device. It sould not be possible to twist te top-at rail. 40

45 06/04 AWB GB Mounting Caution! Te fixing safts of te display/operating unit are designed for mounting te expansion units. Oter devices suc as contactors must not be mounted on tis top-at rail. Attac te expansion unit before fitting te top-at rail. Figure 16: Fitting te top-at rail X Fit te top-at rail in te groove using te slide catc of te power supply/cpu module and te expansion unit. X Turn te top-at rail towards te ousing. X Let te top-at rail snap into position. X Press te power supply/cpu module onto te fixing saft. 41

46 Installation 06/04 AWB GB Figure 17: Fitting te CPU wit and witout top-at rail 42

47 06/04 AWB GB Mounting Mounting te inputs/outputs onto te power supply/ CPU module Figure 18: Plugging in te I/O module Te inputs/outputs can be mounted before or after mounting te power supply/cpu module onto te fixing saft. Figure 19: CPU wit I/O module 43

48 Installation 06/04 AWB GB Removing te inputs/outputs Figure 20: Releasing te I/O module X Press te two catces togeter. X Pull one side out of te catc. X Pull te oter side out of te second catc. Figure 21: Removing te I/O module X Remove te I/O module. 44

49 06/04 AWB GB Mounting Removing te power supply/cpu module Te power supply/cpu module can be removed wit or witout te I/O module. If tere is anoter fixing point for te top-at rail, apart from te one for te display/operating unit, undo it. Figure 22: Releasing te fixing saft Use a screwdriver wit a 100 x 3.5 mm slot widt. X Insert te screwdriver into te lug of te fixing saft catc. X Lever out te slide catc. X Pull out te power supply/cpu module from te fixing safts. Mounting on top-at rail Te power supply/cpu module can be mounted on a top-at rail witout te display/operating unit. Te fastening catces must be removed in order to mount te device on a fastened top-at rail. 45

50 Installation 06/04 AWB GB Figure 23: Removing te spring X Remove te spring wit a screwdriver. Figure 24: Pulling out and removing te slide catc X Pull te slide catc out of te guide and remove it. 46

51 06/04 AWB GB Mounting X Hook te MFD to te top edge of te top-at rail and inge into place wile pressing down sligtly. Press down ligtly on bot te device and te top-at rail until te unit snaps over te lower edge of te top-at rail. Te MFD will clip into place automatically. X Ceck tat te device is seated firmly. Te device is mounted vertically on a top-at rail in te same way. Screw mounting For screw mounting on a mounting plate, fixing brackets must be used tat can be fixed to te back of te MFD. Te fixing brackets are available as an accessory. Te power supply/cpu module can be screwed onto a mounting plate witout te display/operating unit. CLICK! Figure 25: Inserting a fixing bracket Tree fixing brackets are sufficient for a device wit four fixing points. - 47

52 Installation 06/04 AWB GB Figure 26: Screw mounting for te MFD EASY2..-..: easy600: Figure 27: Screw mounting for easy 48

53 06/04 AWB GB Connecting te expansion unit Connecting te expansion unit Figure 28: Connecting expansion units Terminals Tool for cage clamp terminals Slot-ead screwdriver, widt 3.5 x 0.6 mm. Connection cross-sections of te MFD cage clamp terminal cables Solid: 0.2 to 4 mm 2 (AWG 24-12) Flexible wit ferrule: 0.2 to 2.5 mm 2 (AWG 24-12) Tool for slot-ead screws for easy expansion unit Slot-ead screwdriver, widt 3.5 x 0.6 mm, tigtening torque 0.6 Nm. Connection cross-sections of screw terminal cables Solid: 0.2 to 4 mm 2 (AWG 22-12) Flexible wit ferrule: 0.2 to 2.5 mm 2 (AWG 22-12) 49

54 Installation 06/04 AWB GB Network cables and plugs If possible use te prefabricated EASY-NT cables (e.g. 30 or 80 cm). Oter cable lengts can be made using te EASY-NT-CAB cable, te EASY-NT-RJ45 plug and te easy-rj45-tool crimping tool. AWG 24, 0.2 mm 2 are te largest crimpable cross-sections. Te first and last stations in te network must be provided wit an EASY-NT-R bus termination resistor. Connecting te power supply Te required connection data for bot MFD-DC, easy-dc device types wit 24 V DC and MFD-AC, easy-ac wit standard voltages of 100 V to 240 V AC are given in te Capter Tecnical data, Page 409. Te MFD-Titan devices run a system test for one second after te power supply as been switced on. Eiter RUN or STOP mode will be activated after tis time depending on te default setting. 50

55 06/04 AWB GB Connecting te power supply MFD-AC power supply L N > 1 A Ue = 115/230 V 50/60 Hz ( V ) Ie = 70 ma 115 V 35 ma 230 V 0.6 x 3.5 x 100 L N N Figure 29: AC power supply on te MFD Attention! A sort current surge will be produced wen switcing on for te first time. Do not switc on AC via Reed contacts since tese may burn or melt. 51

56 Installation 06/04 AWB GB EASY -AC-.E expansion units L N F1 E+ E- R1... R12 L N N 115/230 V ~ Figure 30: Power supply on te AC expansion units Attention! A sort current surge will be produced wen switcing on for te first time. Do not switc on easy AC via Reed contacts since tese may burn or melt. 52

57 06/04 AWB GB Connecting te power supply MFD DC power supply L01+ L02+ L01 > 1 A +24V 0V 0V Figure 31: Power supply on te MFD Te MFD power supply/cpu module supplies te necessary power supply to itself, te display, te input/output electronics, te easy-link, and optionally te easy-net. Te MFD device power supply/cpu module is protected against reverse polarity. Ensure te correct polarity of te terminals to ensure tat te MFD functions correctly. 53

58 Installation 06/04 AWB GB EASY -DC-.E DC expansion units L01+ L01- F1 E+ E- R1... R12 24V 0V 24 V 0V Figure 32: Power supply on te DC expansion units easy DC is protected against polarity reversal. To ensure tat easy works correctly, ensure tat te polarity of eac terminal is correct. Cable protection Wit easy-ac, easy-dc and te MFD power supply/cpu module, provide cable protection (F1) for at least 1 A (slow). Wen easy or te MFD is switced on for te first time, its power supply circuit beaves like a capacitor. Use a suitable device for switcing on te power supply and do not use any reed relay contacts or proximity switces. 54

59 06/04 AWB GB Connecting te inputs Connecting te inputs easy or MFD inputs switc electronically. Once you ave connected a contact via an input terminal, you can reuse it as a contact in your MFD circuit diagram as often as you like. S1 L +24 V N 0 V I1 I1 i1 Figure 33: Connecting te inputs Connect contacts suc as pusbutton actuators or switces to easy or MFD input terminals. Connecting te AC inputs Caution! Connect up te AC inputs in accordance wit te safety requirements of te VDE, IEC, UL and CSA wit te same pase conductor tat provides te power supply. Oterwise easy will not detect te switcing level and may be damaged or destroyed by overvoltage. 55

60 Installation 06/04 AWB GB MFD-AC basic unit 264 V 1 > 79 V 0 < 40 V I1 I ma 230 V I1 I ma 115 V L N > 1 A U e = 115/230 V 50/60 Hz ( V ) I e = 150 ma 0.6 x 3.5 x 100 L N N I1 I2 I3 I4 I5 I6 I7 I8 I9 I10 I11 I12 N N Figure 34: Connecting te inputs Warning! Te AC inputs must only be used wit MFD-AC-CP8... devices. Oter devices may be destroyed. 56

61 06/04 AWB GB Connecting te inputs AC expansion device L1 N F1 E+ E R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 L N N 115/230 V Figure 35: Inputs on te EASY -AC-.E expansion device Connect te inputs, for example, to pusbutton actuators, switces or relay/contactor contacts. Input signal voltage range OFF signal: 0 to 40 V ON signal: 79 to 264 V Input current I1 to I ma/0.2 ma at 230 V/115 V R1 to R ma/0.25 ma at 230 V/115 V Cable lengts Severe interference can cause a 1 signal on te inputs witout a proper signal being applied. Observe terefore te following maximum cable lengts: I1 to I12 and R1 to R12: 40 m witout additional circuit Te following applies to expansion units: Wit longer cables, connect a diode (e.g. 1N4007) for 1 A, minimum V reverse voltage, in series to te easy input. 57

62 Installation 06/04 AWB GB Ensure tat te diode is pointing towards te input as sown in te circuit diagram, oterwise easy will not detect te 1 state. L1 N F1 E+ E R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 L N N 115/230 V Figure 36: easy-ac wit a diode on te inputs Two-wire proximity switces ave a residual current wit te 0 state. If tis residual current is too ig, te easy input may detect a 1 signal. If inputs wit a iger input current are required, an additional input circuit must be used. 58

63 06/04 AWB GB Connecting te inputs Increasing te input current Te following input circuit can be used in order to prevent interference and also wen using two-wire proximity switces: L1 N F1 100 nf/275 V E+ E R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 L N N 115/230 V Figure 37: Increasing te input current Wen using a 100 nf capacitor, te drop-out time of te input increases by 80 (66.6) ms at 50 (60) Hz. A resistor can be connected in series wit te circuit sown in order to restrict te inrus current. L1 N F1 1 ko 100 nf/275 V E+ E R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 L N N 115/230 V Figure 38: Limitation of te inrus current wit a resistor 59

64 Installation 06/04 AWB GB Complete devices for increasing te input current are available under te type reference EASY256-HCI. L1 N F1 E+ E R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 L N N 115/230 V Figure 39: easy600 wit EASY256-HCI Te increased capacitance increases te drop-out time by approx. 40 ms. Connecting MFD-DC inputs Use input terminals I1 to I12 to connect pusbutton actuators, switces or 3 or 4-wire proximity switces. Given te ig residual current, do not use 2-wire proximity switces. Input signal voltage range I1 to I6, I9, I10 OFF signal: 0 to 5V ON signal: 15 V to 28.8 V I7, I8, I11, I12 OFF signal: < 8 V ON signal: > 8 V Input current I1 to I6, I9, I10, R1 to R12: 3.3 ma at 24 V I7, I8, I11, I12: 2.2 ma at 24 V 60

65 06/04 AWB GB Connecting te inputs L01+ L01 L02+ > 1 A +24V 0V 0V I1 I2 I3 I4 I5 I6 I7 I8 I9 I10 I11 I12 Figure 40: MFD-DC Te digital inputs must ave te same voltage as te power supply of te MFD. L01 + L01 F1 E+ E R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 +24V 0V 0V 24 V H Figure 41: EASY -DC-.E 61

66 Installation 06/04 AWB GB Connecting analog inputs Inputs I7, I8, I11 and I12 can also be used to connect analog voltages ranging from 0 V to 10 V. Te following applies: I7 = IA01 I8 = IA02 I11 = IA03 I12 = IA04 Te resolution is 10-bit = 0 to Caution! Analog signals are more sensitive to interference tan digital signals. Consequently, more care must be taken wen laying and connecting te signal lines. Incorrect switcing states may occur if tey are not connected correctly. X Use sielded twisted pair cables to prevent interference wit te analog signals. X For sort cable lengts, ground te sield at bot ends using a large contact area. If te cable lengt exceeds 30 m or so, grounding at bot ends can result in equalisation currents between te two grounding points and tus in te interference of analog signals. In tis case, only ground te cable at one end. X Do not lay signal lines parallel to power cables. X Connect inductive loads to be switced via te MFD outputs to a separate power feed, or use a suppressor circuit for motors and valves. If loads suc as motors, solenoid valves or contactors are operated wit MFD via te same power feed, switcing may give rise to interference on te analog input signals. 62

67 06/04 AWB GB Connecting te inputs Te following circuits contain examples of applications for analog value processing. Ensure tat te reference potential is connected. Connect te 0 V of te power supply unit for te different setpoint potentiometers and sensors sown in te examples to te 0 V terminal of te MFD power feed. Setpoint potentiometer L01+ L01 L02+ > 1 A 1.3 ko/0.25 W 1 ko/0.25 W H 0 V +12 V +24V 0V 0V I1 I2 I3 I4 I5 I6 I7 I8 I9 I10 I11 I12 Figure 42: Setpoint potentiometer wit upstream resistor Use a potentiometer wit a resistance of F 1kO, e.g. 1kO, 0.25W. 63

68 Installation 06/04 AWB GB Temperature sensor, brigtness sensor, 20 ma sensor L01+ L01 > 1 A L02+ H ma 500 O a +24 V H 0 V C Out V 0 V +12 V V +24V 0V 0V I1 I2 I3 I4 I5 I6 I7 I8 I9 I10 I11 I12 Figure 43: Temperature sensor, brigtness sensor, 20 ma sensor 4 to 20 ma (0 to 20 ma) sensors can be connected easily witout any problem using an external 500 O resistor. Te following values apply: 4 ma = 1.9 V 10 ma = 4.8 V 20 ma = 9.5 V (according to U = R x I = 478 O x 10 ma ~ 4.8 V) 64

69 06/04 AWB GB Connecting te inputs Connecting ig-speed counters and frequency generators Hig-speed counter signals on te MFD-Titan can be counted correctly on inputs I1 to I4 independently of te cycle time. L01+ L01 L02+ > 1 A +24V 0V 0V I1 I2 I3 I4 I5 I6 I7 I8 I9 I10 I11 I12 Figure 44: Hig-speed counter, frequency generator 65

70 Installation 06/04 AWB GB Connecting incremental encoders Inputs I1, I2 and I3, I4 on te MFD-Titan can eac be used for te ig-speed counting of an incremental encoder independently of te cycle time. Te incremental encoder must generate two 24 V DC square wave signals wit a 90 pase sift between tem. L01+ L01 L02+ > 1 A A B +24V 0V 0V I1 I2 I3 I4 I5 I6 I7 I8 I9 I10 I11 I12 Figure 45: Connecting incremental encoders Connecting te outputs Te Q... outputs function inside MFD as isolated contacts. Q1 1 2 Figure 46: Output Q Te respective relay coils are actuated in te MFD circuit diagram via te output relays Q 01 to Q 04 or S 01 to S 06 (S 08). You can use te signal states of te output relays as make or break contacts in te MFD circuit diagram for additional switcing conditions. 66

71 06/04 AWB GB Connecting relay outputs Te relay or transistor outputs are used to switc loads suc as fluorescent tubes, filament bulbs, contactors, relays or motors. Ceck te tecnical tresolds and output data before installing suc devices (see a capter Tecnical data, from Page 409). Connecting relay outputs MFD-R.. R f V H 8A 115 V 8A 230 V 8 A 2A 2A 2A Q1 Q2 Q3 Q W 10 x 58 W M 0 V H, N f 8 A/B L1, L2, L3 (115/250 V ) +24 V H Figure 47: MFD-R.. relay outputs 67

72 Installation 06/04 AWB GB EASY6..-..RE.. 0 V H, N S S2 S3 S4 S5 S6 R 24 V H 8A 115 V 8A 230 V 8 A 1000 W 10 x 58 W 2A 2A 2A F 8 A/B 16 L1, L2, L3 (115/230 V ) + 24 V H Figure 48: EASY RE.. relay outputs EASY2..-RE 0 V H, N S S2 R 24 V H 8A 115 V 8A 230 V 8 A 1000 W 10 x 58 W 2A 2A 2A F 8 A/B 16 L1, L2, L3 (115/230 V) + 24 V H Figure 49: EASY RE.. relay outputs Unlike te inputs, te MFD-R.., EASY6..-..RE relay outputs can be connected to different lines. Do not exceed te maximum voltage of 250 V AC on a relay contact. If te voltage exceeds tis tresold, flasover may occur at te contact, resulting in damage to te device or a connected load. 68

73 06/04 AWB GB Connecting transistor outputs Connecting transistor outputs MFD-T V H ( V H) R 24 V H 0.5 A 0.5 A 5 W/24 V F 10 A 24 V Q 0 VQ Q1 Q2 Q3 Q4 Figure 50: MFD-T.. transistor outputs EASY6..-DC-TE S1 S2 S3 S4 S5 S6 S7 S8 24 V Q 0 V Q F 10 A 0 V H f 2.5 A + 24 V H ( V H) R 24 V H 0.5 A 0.5 A 5 W/24 V Figure 51: EASY6..-DC-TE transistor outputs 69

74 Installation 06/04 AWB GB Parallel connection: Up to four outputs can be connected in parallel in order to increase te power. Te output current will increase in tis case to a maximum of 2 A. Caution! Outputs may only be connected in parallel witin a group (Q1 to Q4 or Q5 to Q8, S1 to S4 or S5 to S8), suc as Q1 and Q3 or Q5, Q7 and Q8. Outputs connected in parallel must be switced at te same time. Caution! Please note te following wen switcing off inductive loads: Suppressed inductive loads cause less interference in te entire electrical system. For optimum suppression te suppressor circuits are best connected directly in te proximity of te inductive load. If inductive loads are not suppressed, te following applies: Several inductive loads sould not be switced off simultaneously to avoid overeating te driver blocks in te worst possible case. If in te event of an emergency stop te +24 V DC power supply is to be switced off by means of a contact, and if tis would mean switcing off more tan one controlled output wit an inductive load, ten you must provide suppressor circuits for tese loads (a following diagrams) V H U emax < U Z < 33 V Q., S. Q., S. 0 V H Figure 52: Inductivity wit suppressor circuit 70

75 06/04 AWB GB Connecting analog outputs Beaviour wit sort-circuit/overload Sould a sort circuit or overload occur on a transistor output, tis output will switc off. Te output will switc on up to maximum temperature after te cooling time as elapsed. Tis time depends on te ambient temperature and te current involved. If te fault condition persists, te output will keep switcing off and on until te fault is corrected or until te power supply is switced off (a Section Monitoring of sort-circuit/overload wit EASY..-D.-T.., Page 395). Connecting analog outputs MFD-RA.. and MFD-TA.. eac ave an analog output QA 01, 0 V to 10 V DC, 10 bit resolution (0 to 1023). Te analog output allows you to control servo valves and oter final controlling elements. Caution! Analog signals are more sensitive to interference tan digital signals. Consequently, more care must be taken wen laying and connecting te signal lines. Incorrect switcing states may occur if tey are not connected correctly. 71