Analogue output module DAO 081

Transcription

1 ANALOGUE OUTPUT MODULE DAO 081 Analogue output module DAO 081 for eight ±10 V DC outputs This analogue output module is used for driving components capable of being analogue driven (e.g. proportional pressure valves, frequency converters, etc.). Technical data Analogue channel specifications Number of channels 8 Output voltage -10 to +10 V DC Output value to Resolution Loading capacity of the output voltage Protection against short circuiting 12 Bit (5 mv/ Bit) > 100 KΩ yes Transient time < 50 µs Analogue precision 0.4 % of the output magnitude Page 1

2 DAO 081 ANALOGUE OUTPUT MODULE Electrical requirements Supply voltage V DC Supply voltage current consumption typically 55 ma maximum 70 ma DIAS bus supply + 5 V Current drawn at the DIAS bus (+ 5 V supply) typically 45 ma maximum 70 ma Connection requirements Required terminal module DKL 022 (Art.-No ) Mechanical coding Connection technique 17 pole spring terminal strip 3 row Miscellaneous Article number Module identification at the DIAS bus Software macro 16#27 DAO081.fub Version 1.xx Hardware version 1.x Standardization UL (E247993) Environmental conditions Storage temperature C Operating temperature C Humidity EMV stability 0 95 %, without condensation in accordance with EN part 2 (industrial) Resistance to shocks EN m/s² Protective system EN IP 20 Page 2 a

3 ANALOGUE OUTPUT MODULE DAO 081 Mechanical dimensions 80 mm 98 mm 45mm 93 mm Page 3

4 DAO 081 ANALOGUE OUTPUT MODULE Connections The connection to the signals is made by means of a 17 pole, 3 row spring terminal strip to the terminal module DKL 022. The supply voltage is connected to terminal 17a or 17b, the supply ground to terminal 17c. The terminals 1a to 8a are for connecting the analogue output channels to. The row of terminals b (terminals 1-16) is assigned entirely to analogue ground and terminal c (terminals 1-16) is entirely assigned to GND (potential ground). Terminal 1 Row a Row b Terminal 17 Row c Terminal Row a Row b Row c 1 analogue output 1 analogue GND GND 2 analogue output 2 analogue GND GND 3 analogue output 3 analogue GND GND 4 analogue output 4 analogue GND GND 5 analogue output 5 analogue GND GND 6 analogue output 6 analogue GND GND 7 analogue output 7 analogue GND GND 8 analogue output 8 analogue GND GND 9 not assigned analogue GND GND 10 not assigned analogue GND GND 11 not assigned analogue GND GND 12 not assigned analogue GND GND 13 not assigned analogue GND GND 14 not assigned analogue GND GND 15 not assigned analogue GND GND 16 not assigned analogue GND GND 17 power supply + 24 V/ 1 power supply + 24 V/ 1 GND Terminal 17a (+24 V/ 1) and terminal 17b (+24 V/ 2) are connected. Page

5 ANALOGUE OUTPUT MODULE DAO 081 Wiring instructions In order to guarantee trouble free functioning it is essential to stick to a meticulous wiring arrangement: The 0 V supply voltage connection must follow the shortest path to the common 0 V terminal. The top-hat rail must be properly connected to earth. The connecting wires to the analogue components must be as short as possible and avoid lying in parallel to wires carrying digital signals. The signal carrying wires must be screened. The screening must be connected to a common screening rail. Connection to the analogue outputs Example of application: axis control for direct current servos, frequency converter DCservo + Output signal AGND Page 5

6 DAO 081 ANALOGUE OUTPUT MODULE Addressing The analogue module is not automatically read into the process map by the operating system. Address Access Function 16#00,16#01 WRITE WORD Analogue output channel 1 (low byte, high byte) 16#02,16#03 WRITE WORD Analogue output channel 2 (low byte, high byte) 16#04,16#05 WRITE WORD Analogue output channel 3 (low byte, high byte) 16#06,16#07 WRITE WORD Analogue output channel 4 (low byte, high byte) 16#08,16#09 WRITE WORD Analogue output channel 5 (low byte, high byte) 16#0A,16#0B WRITE WORD Analogue output channel 6 (low byte, high byte) 16#0C,16#0D WRITE WORD Analogue output channel 7 (low byte, high byte) 16#0E,16#0F WRITE WORD Analogue output channel 8 (low byte, high byte) 16#10 WRITE BYTE Transfer of the analogue output value to the digital to analogue converter 16#18 BYTE Bit 0: Chip Select EEPROM Bit 1: Serial Clock EEPROM Bit 2: Data Input EEPROM Bit 7: Switch-on of the reference voltage for the digital to analogue converter 16#19 READ BYTE Bit 0: Data Output EEPROM Bit 7: The reference voltage for the digital to analogue converter is switched on Status light emitting diodes A green LED at position 16 of the module indicates that the reference voltage is switched on (see addressing). Page

7 ANALOGUE OUTPUT MODULE DAO 081 Matching data For hardware the matching values for offset, multiplier and divisor are determined in the factory. These values are saved in a serial EEPROM found in the module. EEPROM-addresses (decimal): Address Contents 0 check sum (xxxx) 1 code (12345) 2 length of the user data block (49) 3 LSB: number of analogue outputs (0008) Matching data for outputs 4 offset for 0 V channel 1 (e.g. 2050) 5 gain multiplier channel 1 (e.g. 3800) 6 gain divisor channel 1 (e.g. 3804) 7-9, 10-12, 13-15, 16-18, 19-21, 22-24, matching value channel 2 8 The contents of all the addresses given are WORD variables. Calculation of the analogue values to be output: e.g.: Offset 2050 Gain multiplier 3800 Gain divisor 3804 Conversion formula for analogue outputs: VALUE = (desired value x gain multiplier / gain divisor) + offset Example e.g.: Value for 0 V: 0 x 3800 / = 2050 Value for +10 V: x 3800 / = 4048 Value for 10 V: x 3800 / = Page 7

8 DAO 081 ANALOGUE OUTPUT MODULE Operating diagram Initalise: to channel 1 address 16#00 to channel 2 address 16#02 to channel 3 address 16#04 to channel 4 address 16#06 to channel 5 address 16#08 to channel 6 address 16#0A to channel 7 address 16#0C to channel 8 address 16#0E change analogue value: to channel X address 16#00 Handing-over of the analogue output values to D/A-converters by write-access address 16#00 Handing-over of the analogue output values to D/A-converters by write-access address 16#10 Activation of reference voltage at the D/A-converter address 16#18 Bit 7 Page

9 ANALOGUE OUTPUT MODULE DAO 081 Read-out of the EEPROM data data-adress read data Page 9

10 DAO 081 ANALOGUE OUTPUT MODULE Page