Allen-Bradley DF1 Protocol – PLC Error Code Tables
The following PLC error tables cover possible errors that are detected by the panel from Allen-
Bradley PLCs using the DF1 protocol. This includes full and half duplex communications for
the MicroLogix 1000, 1100. 1200 & 1500, SLC 5/03, /04, /05, ControlLogix, CompactLogix
and FlexLogix, and full duplex communications for the PLC5.
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 DF1 Protocol continued on the next page.)
A–7
Appendix A: Panel & PLC Error Code Tables
A
EA1-MG6-USER-M Hardware User Manual, 1st Ed. Rev C, 09/10
PLC Errors for Allen-Bradley DF1 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 DF1 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.