860
Network Instructions Section 3-24
Operation The Explicit Communications Error Flag is used to determine if communica-
tions ended normally or in error.
For error completions (i.e., when the flag is ON), the Communications Port
Error Flag for FINS commands is used to determine if the explicit message
was never sent (i.e., when the flag is ON) or if there was an error in the explicit
message that was sent (i.e., when the flag is OFF).
The Communications Port Completion Code will contain 0000 hex after a nor-
mal end, an explicit message error code after an explicit communications
error end, and a FINS message completion code after a FINS error end.
1) Normal End An explicit message is sent and a normal response is returned.
The corresponding Explicit Communications Error Flag (A213.00 to A213.07:
Communications port No. 0 to 7) will be OFF and the Communications Port
Completion Code (A203 to A210: Communications port No. 0 to 7) will contain
the explicit message normal response code of 0000 hex.
Condition Explicit
Communications Error
Flag (A213.00 to
A213.07:
Communications port
No. 0 to 7)
Communications Port
Error Flag (A219.00 to
A219.07:
Communications port
No. 0 to 7)
Communications Port
Completion Code (A203
to A210:
Communications port
No. 0 to 7)
1) Normal end OFF OFF 0000 hex
2) Error end a) When the explicit
message could not
be sent
ON ON FINS messages comple-
tion code
b) When the explicit
message was sent
but an explicit error
response was
returned
OFF Explicit message error
code
OK
OK
OK
OK
CPU Unit
FINS header
FINS header FINS response Explicit response
Explicit response
CJ-series
CPU Bus
Unit
(e.g.,
DeviceNet
Unit)
Explicit message
Explicit message
Explicit message sent
Processed normall
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