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CTI 2572 Installation and Operation Guide
128
Command Control Word
The Command Control Word contains bits that are set by the PLC logic. The following illustration
indicates how the bits within the word are used.
COMMAND CONTROL WORD (WY4)
12345678910111213141516
ERR
Ack
CMD
Mode
CMD
Trig
Abort
Trig
ERR
Ack
CMD
Mode
CMD
Trig
Abort
Trig
ERR
Ack
CMD
Mode
CMD
Trig
Abort
Trig
ERR
Ack
CMD
Mode
CMD
Trig
Abort
Trig
COMMAND 1COMMAND 2COMMAND 3COMMAND 4
ERROR Ack
Error Acknowledge. The PLC sets this bit to acknowledge the error bit which
was set by the 2572.
CMD Mode
Command Mode. The PLC sets this bit to control how the module command
execution is synchronized with the PLC logic:
0 = Uncoupled mode - The 2572 command processing is not synchronized
with the PLC logic.
1 = Coupled mode - The 2572 command processing is synchronized with the
PLC logic.
CMD Trig
Command Trigger. The PLC sets this bit to initiate a command.
ABORT Trig
Abort Trigger. The PLC sets this bit to abort a command in progress.
Command Status Word
The Command Status Word contains bits that are set by the module. The following illustration
indicates how the bits within the word are used.
COMMAND STATUS WORD (WX2)
12345678910111213141516
CMD
Err
PLC
Err
CMD
Busy
Abrt
Busy
CMD
Err
PLC
Err
CMD
Busy
Abrt
Busy
CMD
Err
PLC
Err
CMD
Busy
Abrt
Busy
CMD
Err
PLC
Err
CMD
Busy
Abrt
Busy
COMMAND 1COMMAND 2COMMAND 3COMMAND 4