Chapter 7
Troubleshooting and Maintenance
7–4
Communication Error Codes appear on the DTAM Plus display as follows:
Com Error Code: nnH
Press ENTER to Reset
Error Code
The error code is in the form:
•
nnH for SLC controllers that do not show extended error codes.
•
X nnH for PLC controllers. The X indicates an extended error code.
The communication error codes provide valuable information when other
symptoms either have not been discovered or have not been understood.
Note: For a complete list of error codes, consult the user manuals for your
Allen-Bradley controller.
The communication error codes specific to the communication protocols are
described below.
Code
(Hex)
Meaning
10
Illegal Format. No File, unknown command, address out of range or memory not
allocated.
50
Address Problem. SLC 500/501 out of physical memory. SLC 502 out of executable
memory.
60
Disallowed due to command protection. Not program owner, file not open for Read/
Write directory, target file open.
07
Illegal size. Source program is larger than destination.
0E
Failed Longitudinal Redundancy Check (LRC).
0B
Access Denied. Not in program mode.
0C
Resource not available. No MemMod, in faulted mode, no forces installed.
Communication Error Codes
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