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Overview of FINS Commands and Responses
6-2
Overview of FINS Commands and Responses
6-2-1
FINS Communications Service
6-2-2
Sending and Receiving FINS Commands and Responses
Command Code
Completion Code
154
FINS communications uses a communications protocol that was developed by
OMRON for its factory automation (FA) control systems.
For information on FINS commands, refer to the CS/CJ-series PLC Communi-
cations Command Reference Manual (Cat. No. W342).
FINS commands are sent using CMND(490) for CS/CJ-series PLCs.
2 bytes
FINS header
Automatically
Command
generated and
code
attached.
Command
2 bytes
2 bytes
FINS header
Automatically
Command
Completion
generated and
code
Code
attached.
Command
The command code is a 2-byte code that indicates the contents of the com-
mand. A FINS command must begin with a 2-byte command code. If there are
parameters, they are included after the command code.
The Completion Code is a 2-byte code that indicates the execution results of
the command. The main response code (MRES) in the first byte of the Com-
pletion Code classifies the execution results, and the sub-response code
(SRES) in the next byte provides detailed results.
The following table shows the correspondence between execution results and
the MRES. For details on Completion Codes including sub-response codes
(SRES) and on error processing, refer to the CS/CJ-series Communications
Command Reference Manual (Cat. No. W342).
MRES
Execution result
00
Normal completion
01
Local node error
02
Remote node error
03
Controller error
04
Unsupported setting error (ser-
vice not supported)
05
Routing error
10
Command format error
11
Parameter error
540 bytes max.
Text
538 bytes max.
Text
MRES
20
Read not possible
21
Write not possible
22
Operating mode error
23
No such Unit
24
Start/stop not possible
25
Unit error
26
Command error
30
Access control error
40
Service aborted
Section 6-2
Execution result
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