Fins Commands And Responses - Omron CJ1W-PNT21 Operation Manual

FINS Commands and Responses

6-1 FINS Commands and Responses
6-1-1 FINS Message Service Communications
FINS
Command Codes
Response Codes
6-1-2 Command Code List
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FINS (Factory Intelligent Network Services) commands are message service
communications commands developed by OMRON for Factory Automation
control devices. They do not depend on a particular transmission path, and
can be used for reading from and writing to PLC memory or the Unit's memory,
sending or receiving acyclic messages over a network, or for controlling
various operations.
The FINS communications can be issued from a CPU Unit, Special I/O Unit, or
host computer, and they can also be sent to any of these. The specific
commands that can be sent depend on the destination.
When the source of the commands is a PLC CPU Unit, the FINS commands
are sent by means of CMND(490). For details on FINS commands, refer to the
Communications Commands Reference Manual (W342).
The CJ1W-PNT21 PROFINET IO Controller Units support two types of FINS
messages:
1 FINS commands targeted at the Unit itself, with the purpose of sending or
retrieving data or invoking control actions.
2 Facilitating the transfer of FINS commands to or from the PROFINET IO
Network. This is known as FINS routing.
The figure below depicts the FINS command structure for the CJ1W-PNT21
PROFINET IO Controller units.
CPU Unit
CMD (490 )
FINS message
Instruction
CMD (490 )
FINS route FINS message
Instruction
FINS messages are defined through their command and response codes.
Command codes are represented by a 2-byte hexadecimal code. FINS
commands always begin with a 2-byte command code; any parameters
required follow the command code.
The response code consists of a 2-byte hexadecimal code indicating the
results of command execution. The first byte provides the main response code
(MRES), which classifies the results, the second byte provides the sub-
response code (SRES), which contains details about the results.
The command codes listed in the following table are supported by the
PROFINET IO Controller Unit. A PLC program can send these to the Unit.
PROFINET IO
Controller Unit
FINS
message
function
FINS
routing
function
PROFINET network
Figure 6-1:FINS command structure
Section 6-1
FINS route FINS message