Directed Electronics VS102 Dokumentacja Pobierz pdf (Strona 55)

B-11

B Buep 19-Expander driver

The tasks are listed below in detail:

TASK PRIOR. LENGTH START CRITERION

1. Write keyboard status 8 3 When pressing or releasing a key

2. Reset message bit 7 2 Press CLR for delete behavior 2

3. Write PLC setpiont 6 2..3 Always after changing a setpoint variable

and leaving the entry field

4. Read actual values 5 2..24*) In priorities 0..6, 12 continuously, other-

wise when display is refreshed

5. Read message bits 4 9 max. Continuously

6. Send PCS status 4 5 After changes

7. Read LEDs, flashing 3 4 Continuously

LEDs, memory and

display behavior

8. Read command word 3 3 Continuously (menu selections only if the

temporary buffer is empty)

*) Depends on the number of variables displayed and if the addresses

are adjacent. If the addresses are not adjacent, one header is required

per non-adjacent variable (1 word).

Data transfer procedure When communicating with each other the PCS operates as master (AST).

It is the master´s task to set up the communication and to send orders to

the PLC. PCS and PLC communicate with the following settings: TTY or

RS-232C, 19200/9600/4800/1200 baud, 8 bit, EVEN parity, 1 stop bit.

Only the interchange of the packets is described in this manual. Refer to

the BOSCH „BUEP 19 transfer protocol“ manual for the structuring of the

packets.

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 87 88

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Directed Electronics VS102 Dokumentacja Strona 55