GE ASTAT XT QT 0008U Series User Manual page 100

byte 4: CRC_Low
byte 5: CRC_High
Note:
There are cases where the ASTAT-XT returns the Normal response, but the requested action cannot be performed or
is modified by the ASTAT-XT. Few examples are:
Requested Action
Write Parameter settings during start process
Write multiple parameters (Function 16), some are out of range
Start command (Function 05) while Stop Hardwired Input is open
It is the user's responsibility to verify that the requested action was performed, by reading the value of the modified
parameters or the status of the command Coils.
• Appendix A - MODBUS RTU Protocol
100
($XX)
($XX)
Performed Action
Ignored.
Limit to allowed range.
Command ignored