Installation manual

Publication 1747-RM001G-EN-P - November 2008

12-62 SLC Communication Instructions

• Enabled bit EN (word 0, bit 15) is set after the message rung goes from

false to true and there is space available in either the channel 1 message

buffers or message queue. It remains set until message transmission is

completed and the rung goes false. If the message rung conditions

remain true, you may retrigger the message instruction by resetting this

bit after either the ER or DN bit has been set, indicating that the

previous execution has completed.

• Waiting for Queue Space bit WQ (word 7, bit 0) is set when the message

rung goes from false to true, but the channel 1 message buffers and

message queue are full. In order to assure that this EEM command gets

processed, you must leave the message rung conditions true until the

WQ bit is reset and the EN bit is set, indicating that the EEM command

has been placed into the message queue. Do not set or reset this bit. It is

informational only.

Error and Error Description on the General Tab

The error codes for the EEM instruction are a superset of the MSG

instruction error codes.

Refer to p. 12-41 for a listing of the MSG instruction error codes.

Table 12.27 lists other valid error codes.

For error code 51, the error description displays the CIP response error code

and description as documented in the CIP Common Specification, Appendix

Any time the Error Code is nonzero, the EEM error (ER) bit is set.

MultiHop Tab

The MultiHop Tab provides a way for the path to the destination node to be

configured. This path can be as simple as the IP address of the destination

node, or can include bridging through a Logix gateway to a remote ControlNet

destination node or to a remote Ethernet destination node.

Table 12.27 EEM Instruction Error Codes

Error Code Description of Error Condition

51 CIP response error code.

52 Configuration error. Receive/send data size exceeds 124 words.

53 Configuration error. Response data > receive data file size.

54 Response error. Unsupported response format.