GE GFK-1541B manual Error Description, Busy

4

Minor Error Codes for Major Error Code 91H (Remote Server Device Error Codes)

Error Status	Error Description
(Hexadecimal)
0191H	Illegal Function. The function code received in the query is not an
	allowable action for the server. This may be because the function
	code is only applicable to newer controllers, and was not
	implemented in the unit selected. It could also indicate that the
	server is in the wrong state to process a request of this type, for
	example because it was un-configured and is being asked to return
	register status.
0291H	Illegal Data Address. The data address received in the query is not
	an allowable address for the server. More specifically, the
	combination of reference number and transfer length is invalid.
0691H	The server’s Service Request Queue is full, or the EEthernet
	Interface received a Modbus Exception Code 06 SLAVE DEVICE
	BUSY.

0791H

An internal server error occurred while attempting to process a Modbus request. This corresponds to the Modbus exception 07

NEGATIVE ACKNOWLEDGE

Note: If using a Modbus/TCP Server other than the IC693CMM321 and receive an error of the form xx91H that is not listed in this table, please refer to the documetation provided with the specific server for details on the meaning of the error.

GFK-1541B Chapter 4 Programming Modbus/TCP Channel Commands 4-25