C-MORE EA1-TCL-M Hardware User Manual - A–9
Allen-Bradley DH485 Protocol – PLC Error Code Tables
The following PLC error code tables cover possible errors that are detected by the panel from
Allen-Bradley PLCs using the DH485 protocol. This includes all MicroLogix and SLC500
PLCs, and any communication connection using an Allen-Bradley AIC device using the
DH485 protocol.
Note: The following errors can be generated from the designated PLC, are monitored by the C-more Micro-
Graphic panel, and displayed on the panel’s screen as a hexadecimal value in panel error code P499, if active.
Please refer to the PLC users manual for additional information.
PLC generated error codes for the Allen-Bradley DH485 protocol continue on the next page.
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PLC Errors for Allen-Bradley DH485 Protocol, Local STS Errors (0-3 bits)
Panel Error Code
P499 Hex Value
Description
0x0
Success; no error.
0x1
DST node is out of buffer space.
0x2
Cannot guarantee delivery; link layer.
(The remote node specified does not ACK command.)
0x3
Duplicate token holder detected.
0x4
Local port is disconnected.
0x5
Application layer timed out waiting for response.
0x6
Duplicate node detected.
0x7
Station is offline.
0x8
Hardware fault.
PLC Errors for Allen-Bradley DH485 Protocol, Remote STS Errors (4-7 bits)
Panel Error Code
P499 Hex Value
Description
0x0
Success; no error.
0x10
Illegal command or format.
0x20
Host has a problem and will not communicate.
0x30
Remote node host is missing, disconnected, or shut down.
0x40
Host could not complete function due to hardware fault.
0x50
Addressing problem or memory protect rungs.
0x60
Function not allowed due to command protection selection.
0x70
Processor is in Program Mode.
0x80
Compatibility mode file missing or communication zone problem.
0x90
Remote node cannot buffer command.
0xA0
Wait ACK (1775 KA buffer full).
0xB0
Remote node problem due to download.
0xC0
Wait ACK (1775 KA buffer full).
0xD0
not used
0xE0
not used
0xF0
Error code in the EXT STS byte. See the error code table on the next page.
EA1-TCL-M Hardware User Manual, 1st Ed., 12/09
A
Appendix A: Panel & PLC Error Code Tables