Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 208)

Remote Error Codes Received from the
1773-KA Module
Appendix B
BĆ16
Error
Code Meaning
Improper command may return this error code*
EEPROM bad*
No reply queued
Device resource unavailable
*if these error codes occur, they will most likely occur during
start- up.
85 This error occurs if you attempt to access an illegal address in a
controller. The 1773-KA module then aborts the message.
Illegal accesses may result because:
Invalid Read/Write length or
All Bit writes not to the same PLC-4 or
Invalid address or
Memory Protection Violation
86 The command cannot be executed because of the switch
settings on the 1773-KA module.
87 The controller you have addressed is in Program mode. This
error results in setting the remote error bit for the associated
rung.
88 Reserved
89 1773-KA unable to buffer message in memory. This error will
only be signalled after 5 re-tries at half second intervals. It
indicates that either a very heavy traffic load is being presented
to the remote station, or that the dynamic memory of the remote
station is corrupted. If the problem clears up after cycling
power and does not recur the cause may be RAM or CPU
failures triggered by heat or noise. If the problem recurs
repeatedly the probable cause is too many messages.