Omron SYSMAC C200HW-PCS01-EV1, Operation Manual

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9-1 FINS Communications Service
The FINS communications service is a communications protocol that was devel-
oped by OMRON for its factory automation (FA) networks. FINS communica-
tions allow C200HX/HG/HE Programmable Controllers on these networks to be
controlled by reading or writing memory area data without the need to program
these operations into the PC user program.
FINS communications use a unique set of addresses which differ from the
address system of the Ethernet network. This different addressing system was
implemented to provide a consistent communications method that can be used
regardless of whether the PC at the target node is on an Ethernet network or is
on another FA network, such as a SYSMAC NET or SYSMAC LINK network.
For details regarding FINS commands, refer to Section 11 Using FINS Com-
mands and Responses in this manual and also to the FINS Commands Refer-
ence Manual (W227).
Communication Units that provide the FINS communications service utilize the
particular functions of the network type that is being used. The PC Card Unit
executes the FINS communications service using UDP/IP. When FINS com-
mands are used for communications between Programmable Controllers as
shown in the following illustration, however, communications are executed with-
out the user having to pay attention to the UDP/IP protocol.
PC Card Unit CV Ethernet Unit
Ethernet
PC Card Unit
FINS Command/Response
FINS Command/Response FINS Command/Response
Note The PC Card Unit uses the CMCR instruction for sending and receiving FINS
commands.
When communications are transmitted from an FA computer to a C200HX/HG/
HE as shown in the following illustration, the C200HX/HG/HE’s memory can be
read, written, and controlled by simply sending datagrams expressing FINS
commands to the PC Card Unit’s UDP port for FINS communications. There is
thus no need to prepare a user program at the C200HX/HG/HE.
Note 1. The PC Card Unit uses the CMCR instruction for sending and receiving
FINS commands.
2. Port 9600 is normally used for sending and receiving FINS commands. To
change this, refer to 7-5-9 Setting the Port Number.
FINS Communications Service
Section 9-1