Omron CP - PROGRAMMING MANUAL 05-2007 - Page 888

855
Network Instructions Section 3-24
Accessing the Completion Code after Executing Communications
Instructions
The completion codes are generally used to troubleshoot errors when they
occur. A completion code of 0000 hex can, however, also be used to confirm
that communications have completed normally.
Port: F
MOV
A218
KEEP
MOVL
A216
TST
A214
MOVL
IR0
<>
,IR0
#0000
Execution condition
d (Execution completed)
a (Executing)
c (Standby)
Communications
instructions
a (Executing)
c (Standby)
d (Execution completed)
When a (Executing) turns ON, a communications instruction
(SEND(090), RECV(098), CMND(490), or PMCR(260)) is executed with
the communications port specified as “F.”
The communications port number that was automatically allocated is
stored in a work word b (Used port) from A218 (Used Communications
Port Number).
Places the I/O memory address (A216) containing the completion code
for the communications instruction executed with automatic allocation of
the communication port into work word e (Code storage location).
Confirms that the First Cycle Flags after Network Communications
Finished for the automatically allocated port number (corresponding bit for
word b in A214) is ON.
Places the I/O memory
address of the communications
response code from work word
e (Code storage location into
index register IR0.
Network communications
error processing
Bit c turns OFF the cycle after the
communications instruction was
executed to enable checking the
communication completion code.
If the completion code indirectly address via IR0
does not equal #0000, communications error
processing is performed.
a
(Executing)
b
(Used port)
e (Code storage
location)
b
(Used port)
e (Code storage
location)