REVISIONS IB (NA) A. *The manual number is given on the bottom left of the back cover. Revision. Print Date Jan., 1992.

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2 REVSONS Print Date Jan., 992 *Manual Number B (NA) 6636A *The manual number is given on the bottom left of the bak over. ~ First edition Revision

3 ...P.... NTRODUCTON.5! Thank you for hoosing the Mitsubishi MESECASeries of General Purpose Programmable Controllers. Please read this manual arefully so that the equipment is used to its optimum. A opy of this manual should be forwarded to the end User. J

4 CONTENTS. GENERA DESCRPTON Features Control operations in data ommuniations System onfiguration and the number of stations when a omputer link system is onstruted ,..,.., ink with a omputer through data link systems Modeswithingfuntion ,,...5 Transmission ontrol funtion , , 2 SYSTEM CONFGURATONS Overall Configurations , , AppliableSyst~~~~ System Configurations and Available Funtions ,...., : ratio of an external devie (omputer) to a PC CPU : n ratio of an external devie to PC CPUs , : ratioofextemaldeviestoapccpu..., :nratioofextemaldevitoPCCPUs m:nratioofextemaldeviestopccpus inks with an external devie (suh as a omputer) through data link systems ,..,..,.., GeneralSpeCifiati Perf~nnan~eSpeCifiatiOns ,,, Transmbsionspeifiations RS232CCOnnetOrspeifiati RS422 terminal Mok speifiions.....,...,., RS422aMe~peifiations ,.,, Data Communiations Funtions ,,...,..,,,., Funtions available using dediated protoots and ommands...,..., Funtions available in the noprotool mode ,...,.,.., Funtions available in the bidiretional mode.....,.,,.,,..,..., Transmission error data read funtion ,....,,., Mode Swithing Funtion During A7 C24 Operations...,,,,,..,..,..., Preautions when mode swithing......,...,..., Proedure for swithing the mode from an external devie Proedure for swithing the mode from a PC CPU...,.,..,..,., Data Communiations Transmission Control Funtion....,.., Preautions when ontrolling transmission DTR /DSR (EWDR) ontrol , ,.., DCl/DC3 transmission ontrol , DCl/DC3 reeive ontrol , DC2DC4sendontrol

5 3.5.6 DC2/DC4reeive ontrd /OSignalsistfOfCPU Buffer Memory Appliations and Alloation SElllNGS AND PROCEDURES BEFORE OPERATON Settings and Proedures More Operah'on Nomenlature Nomenlature ED signals and displays Settings Setting the dediated protool. noprotool mode. or bidiretional mode Setting of transmission speifiiions. main hannels. andterminalresistane Station number setting oadingandlnstallation Handling instrutions nstallation environment... 4 Externalwiring Preautionsduringwiring Connetingthe RS232C onnetors Conneting the RS422 onnetors Conneting a muitidrop link and setting modes and terminal resistane Selfloopbak Test Proeduretoarryouttheselfloopbaktest Setfloopbak test operations WpbaCkTest nspetionandmaintenane HAFDUPEX COMMUNCATONS USNG THE RS23X NTERFACE System ConfigurationsandFuntions Buffer Memory Settings Wiring ON/OFF Timing of the CD and RS Signals of the AJ7C Data transmission timing from an external devie Data transmission timing from an A7C DATA COMMUNCATONS USNG AN M : N MUTDROP NK KeyPoints ConditionsforComputernterlok Computer station number alloation Maximum data ommuniations time per omputer Command and message format for data ommuniations amongomputers Proedure for Data Communiations with a PC CPU Communiations between eah omputer and PC CPUs Data ommuniations with PC CPUs by setting a master station and slavestations... 68

6 i. 7 F b yr P ri F.. r "a 7.2. Setti prioritv of transmissionto the A7 C24 using alfduplextransm'wsion Setting nonpriority oftransmissionto the A7C24 74 withthehdfdwttansmission Reading TransmissionError Data Reading the error ED display status Turning OFF error EDs 78 Settings in the NoPratool M o d e Setting the m>protodmode reeiveompletedode 79 (for reeive withvariamelength data) Speifying noprotool reeive ompletion datalength (fixed length) Settingawordorbyteunitinthenoprotoolmode... 7 send Setting a buffer memory area for noprotool Setting a M e r memory areafor noprotool reeive Settings in the BidiretionalMode ModeSwithSetting Readinginthemodesettingstate Mode swithing designation Transmission Control Setting How to set transmission ontrol Settingsfor hanging theaddresses of DC to D4 odss COMMUNCATONS USNG DEDCATED PROTOCOS setting Rs232C CD Terminal Chek Enable/Diile Setting the TransmissionMethod for RS232C NTA SETnNG OF TRANSMSSON CONTRO DATA TO BUFFER MEMORY Data Flow in Communiations with Dediied Protools ProgrammingHints To write data to thespeial use area in buffer memory PC CPU operation during data ommuniations Preautionsduringdataommuniations Basis of DediatedProtoolControlProedures BasiFormats of Dediated Protod COWOfOrmatl Control format Control format Control format Setting protool data... 8 Transmission SequeneTiming Charts and Communiations Time Charater Area Data Transmission DevieMemory Reamrite Commandsanddevieranges Bath read in units of bits Bath read in units o f words Bath write in units of bits _

7 Bathwriteinunitsofwords Testingdeviememoryinunitsofbit(randomwrite) Testingdeviememoryinunitsdwords(randomwrite) Monitoringdeviememory Extension File Register Read and Write ACPUommon ommands and addresses AnACPU dediated ommands and devie numbers Preautions during extension file register read/write Bath readof the extension file register (ACPUommon ommand) Bath write of the extension file register (ACPU ommon ommand) Diret readof the extension file register (AnACPU dediated ommand) Diret writeto the extension file register (AnACPUdediated ommand) Testing (random write) the extensionfile register (ACPU ommon ommand) Monitoring the extension file register Buff& Memory Read and Write Commands and buffer memory Reading data from buffer memoy (ACPU ommon ommand) Writing data to buffer memory (ACPU ommon ommand) Speial Funtion Module Buffer Memory Readand Write Commands and designation Speial funtion module numbers usingontrd protools Reading data fromthe speialfuntion module buffer memory (ACPU ommon ommand) Writing datato the speial funtion module buffer memory (ACPU ommon ommand) Remate Run/Stopof PCCPU and Reading PC CPU Model Name Commands RUN/STOP Remote Reading 3 PC CPU model name ProgramReadWrite Preautions during program reawrite Program read/write ontrol proedures Parameter memory read/write Sequene 4 program read/write Miroomputer 5 program read/write Comment.6 memroy read/write Extension omment memory read/write... 8 lo GlobalFuntion Commandsandomrol... Setting the globalfuntion (ACPU ommon ommand) Ondemand Funtion Ondemand handshake signaland buffer memory Ondemand funtion ontrol proedure Ondemand funtion designation oopbaktest n j '

8 b. P 9. J r... P. r.r COMMUNCATONS WlTH A COMPUTER N THE NOPROTOCO MODE BasisofthebPrdodMode... 9 Handshakel/OSinals 92 ProgrammingHints Towritedatatothespeialuseareainbuffermemory Preautions during data ommuniations Basi Program to Readmrite Buffer Memory 9 6 ReeivingDataintheN~oolMode(ExtemalDevie.AJ7C24) SendingDataintheNoPratodMode(A7C24~ExtwnalDevie) COMMUNCATONS N THEBDRECTONAMODE BidiretionalModeBasis Handshake Si and Buffer Memory... ProgrammingHints System onfigurationand ommufliations mode for bidiretional modeommuniations Towritedatatoaspeialappkatiiareainbuffermemory Preautions during data ommuniations....4 Bidiretiod Control Proedure Basis BidiretionalCommuniatii Basis COntrd~dOCQk Messageformat Proessing an A7 C24 for Simuttarmus Send in FulCDuplex Mode Basi Programto ReadMlrite Buffer Memory....8 Reeiving Data in the BidiretionalMode (Computer + A7 C24) Transmitting Datain the BidiretionalMode (A7 C24. Computer) TROUBESHOOTNG NAKErrorCodeswithDediatedProtods....2 BidiretionalModeErrorCodes TrouMeshoatingOFF TrouMeshootingflowhart Whenthe'RUN'EDistumedOFF Whentheneutralstatedoesnothangeordataisnatreeived Whenthe2C/N(EDNo.6)or4CM(EDNo.2)istumedON Whenommuniatiisometimesfails Whenundeodeddataistransmitted... 9 APPENDCES APPENDX..2.3 r... APP Preautions Conerning Compatibility and the Use of Exs i tn i g Programs Prepared forthe AJ7C24 Computer ink Module APP27... APP Compatibility... APP Preautions when Using ExistingPrograms... APP Funtion Comparison... APP2

9 APPENDX 2 Prearrtkns onerning Compatibility and the Use d Existing Programs Prepared forthe A7C24S3 Computer ink Module... APP 4 2. Compatibility Preautions When Using ExistingPrograms 2.3 FuntionComparison APP4...APP 4...APP5 APPENDX 3 Preautions Conerning C o m p a t i b i l i t y and the Use of Existing Programs Prepared for the AJ7C24S6 Computer ink Module APP 6 Compatibility... APP 6 PreautionsWhen Using ExistingPrograms... APP 6 APPENDX 4... ASCCode Table... APPENDX 5 Communiations Time between apccpu and an A7C24 APPENDX 6 Preautions During CommuniationsWhen Using 2 2 APPENDX 7 S p e d Funtion Module Buffer Memory Addresses APPENDX 8 Sequene Program Example Showing H o w to Output Word Devie Datato the Printerin the NoProtoolMode APPENDX 9 Example of a Sequene Program for Data Communiations in the Bidiretional Mode... APP 2... APP 24 APPENDX A7 C24Setting Reord Form... APP 25 Funtion Comp'son APP 6 APP 7...APP 8 nterfae... APP...APP 3... APP 8 8. WhenOtherThanAnACPUisUsed... APP8 8.2When the AnACPU is Used... APP 2 APPENDX ExternalView vi

10 . GENERA DESCRPTON MESECA f ' GENERA DESCRPTON. This User's Manual desribes the speifiations, handling andtransmission ontrol protools of the AJ7C24S8 omputer link module. The AJ7C2458 has one RS232C port and one RS422 port. t is the interfae between a PC CPU and an external devie (suh as a omputer or printer) or to thecpu of another PC station. Dediated transmission protools to 4 are used as transmission ontrol proedures on the AJ7C24S8 and a noprotool mode anda bidiretional mode are also available. The user an selet and set these independently for the RS232C and RS422 ports. When using a dediated transmission protool or the noprotool mode/bidiretional mode, data is transmitted using the odes as shown below. ~ PC CPU. FlS232C or Rs422 Computer able Autome ommuniations sequene prqm ' AJ7 ENDpmemsing. C24 ode ASC BN ode Read earths. \ Trammitwd.ta \ \ Write \ data \ (ASC ode) Transmitted data Transmitted ~AnlC24mmeftsdatabetween BN ode anda S C ode.) (234~) Fig.. Data Transmission with the Dediated Protool r PC CPU. Sequene program TOFROM inetwtions Oon to FFH. Rs232C or 2 2 able BUnW m e w ' AJ7 C24 T Oa to FFH External devie (suh as a omputer, printer) Transmit Reeive (Data is transmitled in unhangedode through the buffer memory.) Fig..2. Data Transmission in the NoProtool Mode/Bldiretional Mode

11 . GENERA DESCRPTON MESECA Compared with the AJ7 C24S3 and AJ7 C24S6 omputer link modules, the AJ7C24S8 supports the following six additional funtions: [(l) to (6) are the additional funtions when ompared with the AJ7 C24S3] () Commands dediated for use with the A2ACPU(Sl) and A3ACPU: All memory devies of the A2ACPU(S) and A3ACPU (the AnACPU in this manual) are aessible using these dediated ommands. (2) Data transmission in the bidiretional mode: This feature allows the AJ7 C24S8 to interfae :l data ommuniations using the ACK ode between a PC CPU and a omputer. When data is transmitted from the AJ7 C24S8 to a omputer, a ontrol ode ENQ, the data length ode, and a hek sum are added respetively to the beginning, the middle, and the end of the send message. (The hek sum is optional.) When the AJ7C24S8 reeives data from a omputer, it transmits a ontrol ode ACWNAK bak to the omputer. This indiates the result of the reeive (normal/abnormal). The AJ7 C24S8 thus adds the ENQ ode, data length, and hek sum and heks the reeption of the response message at the data transmission. t heks the reeived data and sends the response message after it reeived data. The length of a data ommuniations sequene program an be shortened by using the bidiretional mode. (3) The ommuniations mode using the RS232C interfae an be set to either fullduplex or halfduplex: The ommuniations mode using the RS232C interfae of the AJ7 C24S8 an be swithed either to fullduplex or halfduplex aording to the speifiations of the peripheral devie. (4) Multidrop link with more than one omputer is possible: More than one omputer an be put into a multidrop link with the AJ7 C24S8. The PC CPU modules in the multidrop link an be aessed from the omputers for read/write of devie data and sequene programs. 2

12 . GENERA DESCRPTON,., MESECA (5) and (6) are the additional funtions when ompared with the AJ7C24=S6] (5) Mode swithing funtion when the AJ7C2448 operates The AJ7 C24S8's RS232C/RS422 interfae an be swithed between the following modes after a startup: N+pratool mode.. Bidiretional mode (6) Transmission ontrol funtion using DCl/DC3 and DC2/DC4 Data ommuniations between the AJ7 C24 and an external devie an be ontrolled by using the DCl/DC3 and DC2/DC4 odes. DCl/DC3 send ontrol, DCl/DC3 reeive ontrol: Enables or disables data send and reeive. DC2/DC4 send ontrol, DC2/DC4 reeive ontrol: Controls the range of sendheeive data. valid tf any exirting program are ured with the AJ7C24S8, reo Appendix.2.3 for interhangeability between the AJ7 C24S8 and the following devier. AJ7 C24 omputer link modules AJ7 C2CS3 omputer link modules AJ7 C24S6 omputer link moduler 3

13 . GENERA DESCRPTON MESECA. Features The features of the AJ7C24S8 omputer link module (hereafter alled the AJ7C24 in this manual) are given below... Control operations n data ommuniations Data transmission operations between an AJ7 C24 and external devies (e, g., omputers) an be ontrolled using either the dediated protools (*) or in the noprotool/bidiretional mode. These ontrol operations an be seleted individually with the RS232C and RS422 ports of an AJ7C24. () Communiations using the dediated protools Communiations at the request of the omputer Data ommuniations is always initiated by the omputer. Designated data is transmitted aording to the request ommand transmitted from a omputer to an AJ7 C24. t is not neessary to reate and hange speial sequene programs in order to use an AJ7C24. Read and write possible to and from all PC CPU devies Data an be read from all PC CPU devies. This permits observation and monitoring of all operations, as well as the olletion and analysis of data. Data an be written to all PC CPU devies. This permits prodution ontrol and prodution diretives to be arried out. An AJ7 C24 an upload and download programs from a PC CPU. PC CPU programs (main sequene and subsequene ontrol programs and miroomputer programs), parameter data and omment data are read by the omputer and stored. When required they an be written to the PCCPU to hange the program. Remote RUN and STOP ontrol of the PC CPU The PCCPU an be remoteontrolled by means of RUN and STOP instrutions from the omputer. When multiple omputers and PC CPU modules are onneted to a link with an AJ7C24 module, the input (X) signals of the CPUs in the link an be turned ON/OFF using any omputer in the link. This funtion an immediately stop or simultaneously start all CPUs in the link. (This funtion is alled the global funtion of the AJ7 C24.) Communiations at the request of the PC CPU The PC CPU transmits the data send request. When the emergeny data needs to be transmitted from a PC CPU to a omputer, the PC CPU transmits a send request to the AJ7C24 to make the omputer exeute an interrupt proessing. : ' 4

14 F! i (This is theondemand funtion of the AJ7 C24. t is availabte only when one omputer is onneted to one PC CPU.) ' r * :The dediated protools onsist of four different protools. The term 'dediated protools' used in this manual is the olletive term for these protools. (2) Communiations in the noprotoovbidiretionamodes Either the noprotool mode or the bidiretional modean be set. (a) Communiations in the noprotool mode ) Data ommuniations an be initiated by a PC CPU Data ommuniations an be initiated by a omputer or any PC CPU. Data an be transmitted from a PCCPU to an external devie by using the TO instrution in the sequene program to write data tothe buffer memory. Data transmitted from an external devie an be read by a PC CPU using the FROM instrution in the sequene program. The following example shows a system with a printer, CRT and keyboard terminal onneted in a : ratio. Data an be output from the buffer memory to the printer or a CRT display using the TO instrution. Data input from thekeyboardtothe buffer instrution fromthe PC CPU. memory an be read using FROM a r PC CPU t TO instrution (write) (Send) Printer, CRT, omputer AJ7 C24 FROM imtrution (FQ Computer, keyboard 2) Reeiving data length an be set to variable or fixed:? P.. The ength of the data transmitted from an external devie and reeived by the PC CPU an be set to variable or fixed. i) Reeiving variablelength data: Data reeive stops when the reeive ompleted ode set by the user is reeived. ii) Reeiving fixedlength data: Data reeive stops when the fixed length of data set by the user is reeived. Both the reeive ompleted ode and the reeiveompletion data length an be freely set by the user. 3) Variable ommuniations memory area The user memory area an be alloated to suit the purpose and appliation of the data transmission.

15 , GENERA DESCRPTON MESECA (b) Bidiretional ommuniations ) Data ommuniations an be initiated by a PC CPU Data ommuniations an be initiated by a omputer or any PC CPU. Data an be transmitted from a PC CPU to an external devie by using the TO instrution in the sequene program to write data to the buffer memory. The data send operation is ompleted when the response message to the sent (reeived) data is reeived from the omputer. The result of the send (normal end/error) is stored in the buffer memory and an be read out. The data reeived from the omputer an be read with the FROM instrution of the sequene program. (When data is transmitted by an AJ7C24) Data TO instrution Xno ON PC CPU (Send omplasd) FROM instrution (Send result) AJ7 C24 send Reapomereeke 2) Data length is set within the send message Computer Data. length is set within the send message when the data is transmitted to a devie. The reeiving side reognizes the data length by the send message. Data pq hek T The send data of the AJ7 C24 is proessed as follows. ENQ:... Added to the head. Data length:... The rend data length set in the buffermemory is transmitted, Data:... The send data stored in the buffer memoryir transmitted. Sum hek:... Computed with the sum heking range in a message. The data transmitted by a omputer and reeived by an AJ7 C24 is proessed as follows. ENQ:. Cheked and removed from the reeived data. Data length:... Stored in the buffer memory as the reeived data length. Data:. Stored in the buffer memory as the reeived data. Sum hek:... Cheked and removed from the reeived data. 3) Variable ommuniations memory area The user memory area an be alloated to suit the purposes and appliations of the data transmission. 6

16 . GENERA DESCRPTON..2 MESECA System onfigurrtion and the number of daions when a omputer link system is onstruted A omputer link system using the dediated protool, noprotool mode, or bidiretional mode an be onstruted by onneting the omputer to the PC CPU in the ratios of :, l:n, 2:, 2:n, and m:n. (*) When the onnetion ratio is l:n or 2:n, up to 32 PCCPU stations an be tied toone link system. When the onnetion ratio is m:n, up to 32 stations of omputers and PC CPU modules an be tied toone link system. ) When the onnetion ratio module is :n: of the omputer to the PCCPU This method of linking uses one omputer and multiple PC CPU modules for up to 32 stations. Data ommuniations is exeuted between the omputer and designated PC CPU stations. This link system is alled a multidrop link system. AJ7l24 (Mi) & A n 24 (stati&2) Max. 32 stations (Number of PC CPU stations) r A n C24 (strrtio/n 3)

17 a i u. GENERA DESCRPTON MESECA 2) When the onnetion ratio of the omputer module is m:n: to the PCCPU This method of linking uses more than one omputers and multiple PC CPU modules for up to 32 stations. Data ommuniations is exeuted between a omputer (whih has aquired theaess right through the ommuniations with other omputers) and designated PC CPU stations. This system is also alled a multidrop link system. w n q ~ p ~ # ' l ~ J J C P C P U U U A n C24 (Station ) A n C24 (Station ) A n C24 (Station 2) _ P A n C24 ( W o n 24) Max. 32 stations (Number of PC CPU stations) :The ondemand funtion and the data ommuniations in the bidiretional mode mentioned respetively in Setion.. (l)(b) and (2)(b) annot be used with the multidrop link sys tems. 'B Y 8

18 , GENERA DESCRPTON,,..., MESECA ~ Unk with a omputer through data link systems..3 n a system onneted through the following data link system, if the system ontains a PCCPU onneted to a omputer via an AJ7C24, data ommuniations is possible between the omputer and a PC CPU not equipped with the AJ7 C24. However, ommuniations is not possible with AOJ2P25/R25 modules. () AOJ2CPUP23/R23or PCCPU in the MESECNET (t) Master/oal stations: Can ommuniate all data (devie memory, programs, et.). Remote /O station: Can ommuniate only speialfuntion module s buffer data. (2) PCCPU in the MESECNET/B Master/oal stations: Can ommuniate all data (devie memory, programs, et.). When a omputer is onneted to a loal station: (Twtjer s y s t e m ).... M : Masterstation :oalaation : Remote Vo station U m : oal /master station :for the third tier :Thir&ierMrtatior R When a omputer is onneted to St.bionthatan autd/mmm d&a a master station for the third tie: n When a omputer is onnetedto a thirdtier loal station: (Threetier P,. The stationthat an send/meive data does ne4 v q even if the aeond tier uses a MESECNETB and the third tier uses a MESECNET (). 9

19 . GENERA DESCRPTON..4 MESECA Mode swithing funtion After the AJ7C24 has started operating, the AJ7C24's RS232C/RS422 interfaes an be swithedto another mode. bprotod mode W e e n formats to 4..5 Bidiretionalmode Transmission ontrol funtion Data ommuniations between the AJ7C24 and an external devie an be ontrolled by using DC odes or DTR/DSR signals. () Control using DCl/DC3 or DC2/DC4 odes *This funtion an be used for ontrolling data ommuniations with an external devie onneted to theaj7c24 at the RS232C/RS422 interfae. il e DCl/DC3 ontrol refers to using thedc and DC3 odes to notify the ommuniating devie of the enabled/disabled state of data reeive. e DC2/DC4 ontrol refers to using DC2 and DC4 odes to indiate the valid range of sendheeive data. 4 e Data to besent/reeived must begin withdc2 ode and end with DC4 ode. r D 2 Data D4 (2) Controlusing DTR/DSR signals *This funtion an be used for data ommuniations with an external devie onneted to the AJ7 C24at the RS232C interfae. edtr/dsr ontrol refers to using the DTR and DSR signals to notify theommuniatingdevie of the enabled/disabled state of data reeive of the AJ7 C24 orexternal devie. *The AJ7 C24ontrols the DTR signal as follows: When data an be reeived: Turns ON the DTR signal. When data annot be reeived: Turns OFF the DTR signal. *The AJ7 C24ontrols the DSR signal as follows: When the DSR signal is ON: Sends when send data exists. When the DSR signal is OFF: Sends only if the DSR is ON when send data exists. x

20 2. SYSTEM CONFGURATONS 2. MESECA SYSTEM CONFGURATONS This setion desribes system onfigurations whih an be ombined with the AJ7 C OverallConfigurations Fig.2.shows the overall onfiguration of the A series system whih is loaded with theaj7c24.. External devie (suh as a omputer, printer, CRT, et.) J Type r. Buildingtype PC CPU modules ' Type Main base units AJ7 C24S8. + r ~ AC3B Exten 'on ables () When loading the AJ7lC24 into type A55B or A586 extension base unit, see Setion2.2 'Appliable System".. ~~ ACOGB AClPB Type f m Computer link module ~ONTS A32 B A35B A38B (2) An extension base unit annot be onneted to a type A328 main base unit (beause an extension onnetor is not provided). "=A! Type A68 A55B A58B Extension base units,/" r. Fig. 2. A Series System Overall Configuration P

21 2. SYSTEM CONFGURATONS 2.2 MESECA.." AppliableSystems The AJ7C24 an only be used in the systems desribed below. () Appliable PC CPU modules and the number of AJ7C24 modules The table below shows the PC CPU modules to whih the AJ7C24 is appliable and the number of AJ7C24 modules whih an be onneted to the PC CPU modules. The PC CPU modules listed below inlude those whih have the MESECNET link funtion. (e.g., AlCPU inludes A CPUP2/R2 to whih an AJ7lC24 an be onneted.) PC CPU Modules Number of Connetable AJ7 C24s Notes f the following modules are used with the AJ7C24, the maximum number of onnetable AJ7lC24 modules annot exeed 2 or 6. (See previous olumn). AW2H Al, AN AS A2(S),A2N(S) AS, A3N A3H,A3M A73 AD5 (S3)/AD5 Hntelligent Communiation Module AD57 Graphi ontroller Module 2 AJ7C2 (Sl) Terminal nterfae Module A2A(S) A3A 6 AJ7C22(Sl) Mukidlop ink System Module AJ7C23 Higher Controller High Speed ink Module AJ7C24(S3/S6) Computer ink Module AJ7 E7 Ethernet nterfae Module l ; f 4 (AOJOCPU and A2CCPU are not appliable.) (2) Appliable base unit The AJ7C24 an be inserted into any slot of a main base unit or extension base unit with these two exeptions: (a) The power supply apaity may be insuffiientto load theaj7c24 into an extension base unit with no builtin power supply (A55B or A58B). Wherever possible, avoid loading an AJ7 C24module into this typeof extension base unit. f it is neessary to use an AJ7C24 module in an extension base unit withno builtinpower supply, it is important to onsider (a) the power supply apaity of the main base unit, and (b) the voltage drop along the extension ables when seleting the extension ables. (b) (The User's Manual of the respetive CPU module employed gives details.) 22 w

22 2. SYSTEM CONFGURATONS MESECA PONTS () The AJ7C24 should not be loaded into the last slot of the A3CPU extension level 7. () The AJ7C24 an also be loaded into the A8 CPU base unit (A78B). The A8CPU User's Manual gives the ommands available when the AJ7C24 is loaded. (2) The AJ7C24 annot be used in a remoto /O station. 23

23 2. SYSTEM CONFGURATONS MESECA 2.3 System Configurations and Available Funtion* The AJ7C24 is a link module to onnet an external devie (suh as a omputer) and a PC CPU. The system an onsist of a single external devie and from to 32 PC CPU stations ( : to 32 ratio system) or two external devies and from to 32 PC CPU stations (2 : to 32 ratio system). The onnetion may be made in two ways: using the RS232C port or the RS422 port : ratio of an external devie (omputer) to a PC CPU () The system onfiguration for a : ratio of an external devie (suh as a omputer) to a PC CPU is shown in Fig. 2.2 below. (Mode: [ ] [ ) in the figure indiates the range of setting set with the mode setting swith of an AJ7C24 (see Setion 4.3.)..( External devie (suh as a omputer, (Mode: to 8) Computer link module AJ7 C24 To ex? PONTS () Use of the RS232C and the RS422 interfaes differs in that the RS422 is used to onnet long distanes (up to 5 m (64.5 ft)) and the RS232C is used to onnet short distanes (a maximum of 5 m (49.2 ft)). (2) To have the RS232C ommuniate over a distane greater than 5 m (49.2 ft), use a modem or RS232C/RS422 onverter between the external devie and the AJ7 C24. Fig. 2.2 System Configurations () 24

24 2. SYSTEM CONFGURATONS MESECA (2) The following tables list the funtions available when an external devie is linked with a PC CPU module to make a : onfiguration. (a) The interfae used to set dediated protools to 4: ) Funtions available when using an external devie ntwtmss tor Dedat.d Protool AV8i8bh Funtions us422 Not. RS232C Aeadhvrite Extension file regists Monitor Readhvrite Monitor Buffer memory AJ7 C24 of the Fbadhvrite Speid fun* tion module s buffer memory Readlwrite Sequene Miroomputer program Readlwrite Readhvrite o self Comment Parameter PC CPU Global Readlwrite r Remote RUNSTOP PC CPU type read nput signal (X) ONOFF o o o Transmission of reeived data 25 ~ Selfloopbak test nluding extension devies ~ ~~ nluding extension omments

25 2. SYSTEM CONFGURATONS Y MESECA 2) Funtions available when using a PC CPU ntorfaw8 for Dodialod Protool Availablo Funtions Ondomand Data transmisrion toexternal devies US422 RS232C Not. (b) nterfaes used to set the noprotool mode Funtions available when using an external devie and a PC CPU Available Funtions RS232C RS422 PC CPU to external devie Reeive, External devie to PC CPU, inlerfaer for Noprotool Mode o o Nolo To omputers, printers, and CRTs. From omputers and keyboards () nterfaes used to set the bidiretional mode Availablo Funlions 'd i Funtions available when using an external devie and a PC CPU n t n t a o s for BidirotionalModo,? J ' kj Note RS422 US232C Send PC CPU to omputer To omputer8 Reeive Computer to PC CPU From omputers,a 9 d 26 a

26 2. SYSTEM CONFGURATONS : n ratio of l extemal dmfle to PC CPUs >. MESECA () The system onfigurations for a : n (up to 32 stations) ratio of an external devie (suh as a omputer) to PC CPUS are shown in Fig. 2.3 below. (Mode: [ ] to [ ) in the figure the range of setting set with the mode setting swith of an AJ7 C24 (see Setion 4.3.). [System onfiguration The external devie is onneted to the AJ7C24 modules using the RS232C dovie (omputer) Rspx interfae RE422 interfae R5422able RE422 interfae RE422mbk R5422 interfae Maximum of 32 stations [System onfiguration 2 The external devie is onneted to the AJ7 C24 modules using the RS422 Computer E422 intedae link modules ~ONTS () When the mode setting is 5 to 8, the RS232C interfae whih is not used for the multidrop link an be used for ommuniations with a omputer, a printer, or a CRT in a noprotool/bidiretional mode. (2) Use of the RS232C and the RS422 interfaes differs in that the RS422 is used to onnet long distanes (up to 5 m (64.5 ft)) and the RS232C is used to onnet short distanes (up to maximum of 5 m (49.2 ft)). (3) To have the RS232C ommuniate over a distane greater than 5 m (49.2 ft), use a modem or RS232C/RS422 onverter between the external devie and the AJ7 C24. Fig. 2.3 System Configurations () 27

27 2. SYSTEM CONFGURATONS MESECA (2) The following tables list the funtions available when an external devie is linked with the PC CPU modules to make a : n onfiguration. (a) The interfae used to set dediated protools to 4: ) Funtions available when using an external devie Available Funtions Read/write Devie memory Test RS422 Monitor Readlwrite Extension file register Test Monitor Buffer memory AJ7lC24 of the self Readlwrite Speial funtion module's Readlwrite buffer memory, nlerfaer ior Dadlated Prolod RS232C Note nluding extension devies nluding extension omments 4 Sequene/ ~ Comment Readlwrite Parameter Readlwrite Remote RUNSTOP PC CPU type read PC CPU Global nput signal (X) ON/OFF Selfloopbak test Transmission of reeived data 28 '4 r

28 . 2. SYSTEM CONFGURATONS.. MESECA 2) Funtions available when using a PC CPU 4 P ntorfaor for k d l m t o d Protoeol Arallablo Funtion8? Data trawmirsion to external devies Ondemand Note RS422 RS232C X X (b) nterfaes used toset the noprotool mode Funtions available when using an external devie and apc CPU. P F ntortao8 for Noprotool Mode Avaikblo Funtion8 Send PC CPU to external devie Reeive External devie to PC CPU RS422 RS232C o Note To omputers, printers, and CRTs. From omputers and keyboards ~~ : f the external devie is apable of performing fullduplex transmiasion,.. data ommuniations in the noprotool mode an be performed. () nterfaes usedto set the bidiretional mode r Funtions availablewhen using an external devie and apc CPU. r i Avallablo Funilons r. nlortao8 f o r Bidlrutional Modo RS422 Send Reeive PC CPU to omputer Computer to CPU PC 29 Not. RS232C x l x l x x To omputers omputerr From

29 2. SYSTEM CONFGURATONS MESECA 2 : ratio of external devies to 8 PC CPU () The system onfiguration for a 2 : ratio of external devies (suh as a omputer) to a PC CPU is shown in Fig. 2.4 below. (Mode: [ ] to [ ) in the figure indiates the range of setting designated with the mode setting swith of an AJ7C24 (see Setion 4.3.). Y a (A ombination of two systems eah of whih has a : onfiguration.) mm External devie (suh as a orn puter, printer, CAT) External d e v i i (suh as a orn puter, printer,crt) AJ7 C24 PONTS () One of the two interfaes is set to a dediated protool, 2, 3, or 4. The other is set to a noprotool/bidiretional mode. i (2) The use of the RS232C and the RS422 interfaes differs in that the RS422 is used to onnet long distanes (up to 5 m (64.5 ft)) and thers232c is used to onnet short distanes (maximum of 5 m (49.2 ft)). (3) To have the RS232C ommuniate over a distane greater than 5 m (49.2 ft), use a modem or RS232C/RS422 onverter between the external devie and theaj7c24. Fig. 2.4 System Configurations (ll) 2

30 2. SYSTEM CONFGURATONS MESECA (2) The followingtableslist thefuntions available when theexternal devies are linked with the PC CPU modules to make a 2 : onfiguration.... (a) The interfae used to set dediated protools to 4: ) Funtions available when using external devies Available Fundionr intorlaor for Dediatod Protool Note Readlwrite nluding extension devies Monitor l o Readlwrite Extension file register Monitor e Buffer memory Readlwrite Sequene miroomputer program Readlwrite Comment Readlwrite Parameter Readlwrite ~~ n r PC CPU Remote RUNSTOP PC CPU type read Global nput signal (X) ONOFF Selfloopbak test Transmission of reeived data C l o l o Speial funtion module's buffer memory 2 o o o nluding extension omments

31 2. SYSTEM CONFGURATONS MESECA 2) Funtions available when using a PC CPU Available Funtions ntertaos for Doda.d Protool RS422 RS232C Note Ondemand Data tranrmisrion to external devier (b) nterfaes used to set the noprotool mode Funtions available when using external devies and a PC CPU Send Availablo Funtions PC CPU to external devie nterfaes for Noprotool Mode RS422 RS232C CRTr. Reeive to PC CPU o o External devie Not. To omputers, printers, and From omputers and keyboards () nterfaes used to set the bidiretional mode Funtions available when using external devies and a PC CPU b Send Avalirble Funllons ntortaos for Bldlrolio~l Modo RS422 RS232C N ole PC CPU to omputer o To omputer8 Reeive Computer to o o omputers From PC CPU 2 2

32 2. SYSTEM CONFGURATONS MESECA : n rrtlo external to PC kpu8 () The system onfiguration for a 2 : n (up to 32 stations) ratio of external devies (suh as a omputer) to PC CPUs is shown in Fig. 2.5 below. (Mode: [ ] to [ ) in the figure indiates the range of setting set with the mode setting swith of an AJ7lC24 (see Setion 4.3.). (A ombination of two systems one of whih has a : onfiguration and the other has a i : n onfiguration.) 'ONTS () One of the two interfaes of the AJ7C24 whih is onneted to the external devies is set to a dediated protools, 2, 3, or 4. The other is set to a noprotool/bidiretional mode. (2) When the mode setting is 5 to 8, the RS232C interfae whih is not used for the multidrop link an be used for ommuniations with a omputer, a printer, or a CRT in a noprotool/bidiretional mode. (3) To have the RS232C ommuniate over a distane greater than 5 m (49.2 ft),use a modem or RS232C/RS422 onverter between the external devie and the AJ7 C24. Fig. 2.5 System Conflguratlons (V) 23

33 2. SYSTEM CONFGURATONS MESECA (a) The interfae used to set dediated protools to 4: ) Funtions available when using external devies Available Funtions nlorfaer for Dodkated Protool RS422 RS232C Not. Read/write Devie memory Test Monitor nluding extension devies Extension file register ' Readlwrite Test Monitor Buffer memory AJ7C24 of the self Read/write Speial funtion module's Read/write buffer memory Sequene/ miroomputer Readlwrite program Comment Read/write l o l o l Parameter Read/write nluding extension omments PC CPU Global Remote RUNlSTOP PC CPU type read nput signal (X) ONlOFF Selfloopbak test Transmission of reeived data 2 4

34 2. SYSTEM CONFGURATONS MESECA 2) Funtions available when using PC CPUs Protool Avallablo Funtions RS422 Data transmission to external devies Ondemand Not. RS232C : Data ommuniations is possible only with the system whih has a : onfiguration (one external devie to one PC CPU, as shown in Fig. 2.5) (b) nterfaes used to set the noprotool mode RS422, o*l Funtions available when using external devies and PC CPUs Avallabk Funtions Send PC CPUto external devies Reeive External devie to PC CPU t * ~~ ~~ ~ ~ ntorfaes for Neprotool Mode o Note Rf232C O*l To omputers, printers, and CRTS. From omputers and keyboards : f fullduplex transmission is possible with the external devie, data ommuniations in the noprotool mode is poasible with thesystem whih has the : n onfiguration (external devie2 to PC CPUs, as shown in Fig. 2.5). () nterfae used to set the bidiretional mode, Funtions available when using external devies and PC CPUs Available Funtions Send PC CPU to omputer Reeive Computer to PC CPU nterfaoor for Bidirotlonai Modo RS422. RS232C. Note To omputers From omputers : Data ommuniation8 is possible only with the system whih has a : onfiguration (external devie to one PC CPU, as shown in Fig. 2.5). 2 5

35 2. SYSTEM CONFGURATONS MESEGA m :n ratio of extemal devies to PC CPUs () The system onfiguration for a m : n (up to 32 stations) ratio of external devies (suh as a omputer) to PC CPUs is shown in Fig. 2.6 below. (Mode: [, [, [ ) in the figure indiates setting set with the modesetting swith of an AJ7C24 (see Setion 4.3.). * set a l l AnlC24s to the samo protod. e: External d m (omputer) i 4 Computer link module RS422 able RS422 interfae Maximum of 32 stations SONTS i () All the external devies and AJ7C24 modules are onneted to form a multidrop link in theabove examplewhih uses dediated protools, 2, or 4. The multidrop link of the m : n ratio system onfiguration annot use dediated protool 3. When multiple external devies and AJ7C24 modules are used to form a multidrop link, the proedure to exerise the aess right with a speifi station should be provided.. J a (2) When the mode setting is 5 to 8, the RS232C interfae whih is not used for the multidrop link an be used for ommuniations with a omputer, a printer, or a CRT in a noprotool/bidiretional mode. (3) To have the RS232C ommuniate over a distane greater than 5 m (49.2 f t ), use a modemor RS232C/RS422 onverter between the external devie and the AJ7C24. Fig. 2.6 System Configurations (V) 26 Y

36 P. b 2. SYSTEMCONFGUMT _..,.~,., ~.i,!.,~ ~, A, MESECA (2) The following tables list thefuntions available when the external devies are linked with the PC CPU modules making an m : n onfiguration. r (a) The interfae used to set dediated protools, 2, 4: ) Funtions available when using external devies ntorfaoor for D o d l a t d Protool Avallabla Funllonr RS232C Devie memory Extension file registrr r... P P Test Read/write Test nluding extension devies o o Monitor Buffer memory self Speial funtion module's buffer memory Road/write Sequene miroomputer program Rrad/wrtte Comment l o l l l o o Readlwrite O. O nluding extension omments P. f fullduplex transmission is possible with the external devie, data ommuniations in the dediated protool mode is possible with the RS232C interfae. 2 7

37 ~~ ~~ ~~~ ~~ ~ ~ ~~ ~ ~~ 2. SYSTEM CONFGURATONS 2) Funtions available when using a PC CPU Available Funtionr nterfaer for Dediated Protool, Note RS422 RS232C ] MESEGA (b) nterfaes used to set the noprotool mode (Mode: for stations set to 5, 6, or 8) Funtions available when using external devies and the PC CPU Available Funtions interfaoo for Noprotool Mode RS422 RS232C Note Send PC CPU to external devies To omputers, printers, and CRTs. () nterfaes used to set the bidiretional mode (Mode: for stations set to 5, 6, or 8) Funtions available when using external devies and the PC CPU Bidiretional Mode RS422 RS232C Send Note PC CPU to omputer l. To omputers : Data ommuniations is possible only with the : ratio onfiguration. 2 8

38 2. SYSTEMCONFGURATONS , MESECA, U n k with an external devie (suh as a omputer) through data link systems By installing the AJ7lC24 to a PC CPU linked with other PC CPUs on data link systems, ommuniations is possible with other PC CPU stations on MESECNET(), MESECNET/B.. r However, ommuniations is not possible with AOJ2CPUP23/R23 or AOJ2CPUP25/R25 modules... Master station (M Computer P Remote station 3 33) 5 PC CPU rnoduk?. oalstation CPU d l.. r oal station 3 (3) PC CPU module oal station 2, thirdtier master station (Wm) Remote station 2 (r2 station) 5 PC CPU module oal station () ink rnodul. P. u Set the mode w&hs ( w e W o n 4.3.) as follows: W n a multidrop link isformed: 5 to 8, A b t When a multidrop link isnot fonnsd: to 8 Fig. 2.7 System Configurations ( V ) 29

39 2. SYSTEM CONFGURATONS MESEGA Range of PC CPUs with whih ommuniations is possible: (PCCPUs equipped with AJ7C24) (MESECNET M station (master station) stations (loal stations) ~.. (ll), MESECNETlB stations with whih ommuniations is possible) () The rdf (2) Ali ssmdtis loal stations (, W m ) (3) slondtirr m o t e VO statim8 equippsd with a spdal funtion module (W) () T h e d f (2)Seondtiermasterstation /m station (loallthirdtier master station).... (M station) () The self (2) Seondtiermasterstation (M station) (3) All thirdtier kal stations (,3) station (thirdtier loal stations) (4) Thirdtier remote VO stations equipped with a speial funtion module (r2) () The self (2) Thirdtirr master station (M station)( U m )

40 2. SYSTEM CONFGURATONS MESECA MEMO 22

41 3. SPECFCATONS 3. SPECFCATONS 3. General Spelflatlons MESECA Table 3. General Spelflatlons Storage ambient temperature Operating ambient humidity 2 to 75" (4 to 67 F) to 9% RH, no ondensation ambient humidity to 9% RH, no ondensation Vibration resistane Conforms C Shokresistane Y loto=& 7.75 mm (.3inh) times * otave Conforms to JS C 92 (98m/sZ (log) x 3 times in 3 diretions) Noise By noise simulator 5 V.P.P. noise voltage, pse noise width and 25 to 6 Hz noise frequeny Dieletri withstand voltaae 5 VAC for minute aross bath of DC external terminals and ground lnrulation resistane 5 MO or more with 5 VDC insulation resistane tester at the same loation as dieletri strength. Operating ambiene No orrosive gases or dust. Cooling method Selfooling Jl 7 3 EMA ARK] ()Oneotave marked indiates a hange from the initial frequeny to double or half frequeny. For example, any of the hanges from Hz to 2 Hz, 2 Hz to 4 Hz, 4 Hz to 2 HZ, and 2 Hz to Hz are referred to as one otave. 3 (2) The noise durabilityand dieletri withstand voltagevalues wereobtained with the RS232C and RS422 interfaes unonneted. ** JS: Japanese ndustrial Standard 3 3 nl is

42 3.SPECFCATONS 3.2.,.,...,..,,._, MESECA Performane Speifiations 3.2. TransmWonspetflCaion~ Table 3.2 Transmission Speifiations tem SpoHiations Conform to RS232C. nterfae Conform to RS422. RS232C Transmission method RS422. Start bit Data bit 7 or 8 Parity bit or none Stop bit or2 Noprotool/bidiretional '4 BPS (swith seleted) Seletable Parity hek presont (oddleven)/absent Sum hek presenthbsent DTWDSR (EWDR) ontrol Present /Abrent (RS232C only) DCl/DC3, DC2/DC4 ontrol Prerent /Absent Dediated protool :,:n,m:n*2 Noprotool :, : n.2 Bidiretional : Up to 5 m (49.2 f t ) for RS232C Up to 5 m (64.5 n) for RS422 5 VDC,.4 A Current onsumption Number of oupying Fullduplex ommuniations 8ystem Eah request is proessed in the END proessing of the sequene program. Therefore, aess yle is san time. Transmission distane Halfduplex ommuniationssystem * Dediated prot 3,6,2, 24,48,96,92 System onfiguration (External devie: PC CPU) Full/halfduplex (buffermemory setting) Transmission system Error detetion Noprotooilbidiretional Asynhronous system Aess yle.. Halfduplex ommuniationssystem ' Synhronous system Data format.. Dediated protool 32 *3 /8 Weight 63 g (.39 b) h o m m e n d d able (for R22) Rs422 SPEV(SB)MPC..2 x 3p Fieommended Rs232C to RS422 onverter ENEM ': f the ondemand funtion is umd, onty fullduplex ommuniations is available when fullduplex ommuniations is enabled. *2: 'n' for :n ratio is up to 32. Total of 'm' and 'n' for m:n ratio is up to 32. '3: Set the speial funtion modules to have32 inputsloutputs when the alloation is set. '4: Horizontalparity 32

43 j 3. SPECFCATONS MESECA d RS23X onnetor SpeifiaUOns b 5 i F a F r m io ground SD (TXD) ' FG = 7 J RD (RXD) l o o 2 3 'lo Clearto w n d CS (CTS) 6 Data set ready DSR (DR) 7 Signal ground SG Reeive arrier detetion 7 i d Fig. 3. RS232C Connetor Speifiations () Signals are desribed below. (a)fg signal Connet the able shield to pin of the AJ7C24. f boththe omputer and the AJ7C24have an FG pin, onnet the able shield to one of the FG pins only. f the able shield isonneted to bothfg pins, the resulting noise may prevent orret data ommuniations. (b) RS signal The AJ7 C24system turns ON/OFF the RS signal aording to the setting of the CD terminal hek (see Setion 7.) and thetransmission method (see Setion 7.2), as shown below. Trans CD termlnal Chek Mathod Stat. of the CD Signal ~ Enabled Fullduplex Halfduplex Disabled Enabled (always set 4 Ahrl$ ON OFF ON OFF.. ON OFF ~ RS Signal ONlOFF Control When the AJ7C24 is in the ready state, the AJ7C24 system turns RS signd ON. The AJ7 C24 system turns the RS signal OFF. When the AJ7C24is in the r e a d y state, the AJ7C24 system turns thers dgnal ON. (normally ON) See Setion 5. Data transmission from the external devie shouldbe doneonfirming the RS signal ontrolled by the AJ7 C24. () CS signal Data is only transmitted from the AJ7C24 when this signal is ON d

44 A SPECFCATONS..., ". _.._..._..... 'i'. 7 '8 '. 'i,,.,,,.... MESECA (d) DSR signal During DTR/DSR ontrol, when this signal is OFF, data is not transmitted from the AJ7 C24to an external devie. f DTR/DSR ontrol is not exeuted, the DSR signal status will be ignored. When the external devie an reeive data, make sure that this signal is ON. (e)cd signal The AJ7C24 operates aording to the setting of the CD terminal hek. \ Fullduplex CD Tormlnal Chok Enablod The AJ7 C24 pefforms tranrmiesion proessing when thecd signal (reeivs arrier detetion) is ON. The transmirsion soquome of the AJ7lC24 is initialized when thecd signal is turned OFF during d d a ommuniations in the dediated protool. CD Tormlnal Chok D k a b k d The A7 C24 performs transmission proessing regardless of the ON/OFF stat. of the CD signal. (This enables data ommuniations with those external devies whih annot ontrol (ON/OFF) the CD signal.) Setting impossible (f) DTR signal The AJ7C24 system ontrols the DTR signal as follows: The AJ7C24 system turns ON the DTR signal when ommuniations is enabled if the dediated protool or bidiretional mode is urrently used. WhenDTR/DSR ontrol is exeuted, the AJ7C24 system turns ON/OFF the DTR signal aording to the size of available area of the reeive data storage OS area during ommuniations in the noprotool mode. (The DTR signal turns ON when the data ommuniations of the AJ7 C24is enabled.) Setion gives for the ON/OFF timing of the DTR signal. Sine the reeived data is stored in the OS area when the DTR signal is OFF, read the reeived data using thesequene program (See Setion 9); This signal is ON during DTR/DSR ontrol. (2) ON/OFF definitions are as follows: ON : 5V to 5 VDC OFF : 5 V to 5 VDC (3) nterfae onnetor The following type of RS232C onnetoris used. Use a mathing onnetor. 25pin Dsub (female) srewfixing type 34

45 3.SPECFCATONS MESECA n RS422 terminalblok speifiations ~~ Abbreviation Signal Direalon A7 C24. Computer SDA. Desription Send data Reeive data Reeive data Signal ground Frame ground Fig. 3.2 RS422 Terminal Blok Speifiations () Fig. 3.3 shows the RS422 funtion blok diagram. a :7 RDA data h RDB Fig. 3.3 RS422 Funtion Blok Diagram RS422 ablespeiflritlon8 3 An RS422 able is reommended in Setion Other types of ables may be usedinstead, if theyonformtothespeifiationslisted in the following table. item Cable type Number of pairs 3 Pairs Condutor resistane (2 C) 88. Qlkm or nsulation resistane. MQ km or less Dieletri strength 5 VDC, minute Eletrostati adaitv ( KHz Charateristi impedane ( KHz) Fig d' less 6 nflkm or less on averaae 2 OQ RS422CableSpeifiations Dosrlption Shielded able 4 J (km=