ifm
Device manual AS-i M4 Gateway Profibus DPV1 (AC1375, AC1376)
2012-02-23
DP module 12: extended command channel
Syntax of the extended command channel
207
11
DP module 12: extended command
channel
Syntax of the extended command channel............................................................................... 207
Error codes in the module 12 .................................................................................................... 209
Commands in the extended command channel........................................................................ 211
5679
The extended command channel is used to exchange data between the AS-i master and the Profibus
host (PLC).
Info
In some controllers larger consistent data fields cannot be processed in the direct I/O address area.
Special function calls are then required.
11.1
Syntax of the extended command channel
5680
Length 2...18-word
consistent
inputs/outputs (if not used: length = 0)
the word 2 is reserved for 7.4 commands (if not used: word = 0)
NOTE
►
If a command is to be executed, the user ID must be changed!
Changing the command number alone does not start the execution.
►
If a command is to be executed several times, the user ID must be changed accordingly, e.g. by
counting up.
►
Do not count up the user ID until the preceding command has been completed
(to do so, check the bits E + B in the 1st word).
