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GFK-1084B Chapter 3 Programming Communications Requests
the COMMREQ function and then check for a non-zero value indicating that the
Ethernet Interface is responding to the COMMREQ. A good way to do this is to use
a MOVE WORD function block to zero the CRS word.
3. A status code of 1 in the low byte and 0 in the high byte indicates that the request
was successful. All other non-zero values indicate errors. Refer to the tables below
for a complete listing of major and minor error codes.
The following tables list the error codes that are reported in the COMMREQ Status word
after the execution of a COMMREQ function. These codes also may appear in Word 1 of
the Detailed Channel Status words.
Table 3-4. Major Error Codes
Error Status Major Error Description
Hexadecimal
01H Successful Completion. (This is the expected completion value in
the COMMREQ Status word.)
02H Insufficient Privilege at server PLC. For a Series 90-70 server PLC, the
minor error code contains the privilege level required for the service
request.
04H Protocol Sequence Error. The server CPU has received a message that is
out of order. Call GE Fanuc Automation for assistance.
05H Service Request Error at server PLC. The minor error code contains the
specific error code. See table of Minor Error codes below.
06H Illegal Mailbox Type at server PLC. Service request mailbox type is ei-
ther undefined or unexpected. Call GE Fanuc Automation for assistance.
07H The server PLC CPUs Service Request Queue is full, usually due to
heavy CPU loading. The client should retry later. It is recommended
that the client wait a minimum of 10 milliseconds before sending anoth-
er service request.
0bH Illegal Service Request. The requested service is either not defined or
not supported at the server PLC. (This value is returned in lieu of the
actual service request error (01h), to avoid confusion with the normal
successful COMMREQ completion.) Call GE Fanuc Automation for assis-
tance.
11H SRTP Error Codes at server. An error was detected at the SRTP server.
See table of Minor Error codes below.
82H Insufficient Privilege at client PLC. For Series 90-70 PLC, the minor er-
ror code contains the privilege level required for the service request.
84H Protocol Sequence Error. The CPU has received a message that is out
of order. Call GE Fanuc Automation for assistance.
85H Service Request Error at the client PLC. The minor error code contains
the specific error code. See table of Minor Error codes below.
86H Illegal Mailbox Type. Service request mailbox type is either undefined
or unexpected. Call GE Fanuc Automation for assistance.
87H The client PLC CPUs Service Request Queue is full. The client should
retry later. It is recommended that the client wait a minimum of 10 mil-
liseconds before sending another service request.
8bH Illegal Service Request. The requested service is either not defined or
not supported. (This value is returned in lieu of the actual service re-
quest error (01h), to avoid confusion with the normal successful
COMMREQ completion.). Call GE Fanuc Automation for assistance.
90H Client API error. See table of Minor Error codes below.