5 omron cs1 and cv plcs, Using omron plcs with the rmc enet, Omron cs1 and cv plcs -130 – Delta RMC101 User Manual
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RMC100 and RMCWin User Manual
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5.2.6.5 Omron CS1 and CV PLCs
5.2.6.5.1 Using Omron PLCs with the RMC ENET
Overview
The CS1 and CV families of PLCs from Omron Electronics Inc. can be used to control the RMC
over Ethernet. These PLCs require the ETN01 Ethernet Unit and use Omron's FINS protocol to
communicate with the RMC.
Note:
Ethernet communication with the Omron PLCs requires RMC ENET firmware dated
20001023 or later.
Note:
The documentation below assumes the user is familiar with Omron PLC programming,
and instead focuses on how to initiate reads and writes to an RMC.
The FINS protocol uses a three-stage addressing system: network address, node number, and
unit number. These three address elements have the following purposes:
• Network Address:
This value identifies the network on which the target node resides. The PLC looks up this number
in its Local and Remote Network Tables to determine which local unit number should be used to
send out the request. For Ethernet systems, typically only the Local Network Table is used to
map a network address (for example, 1) to the unit number on the ETN01 Ethernet Unit (for
example, 0). See your Omron PLC and/or CX-Programmer documentation for details on setting
up the Local and Remote Network Tables.
• Node Number:
This value identifies the node on the network given by the network address. For Ethernet
networks, this number must be converted to an IP address. This conversion is done by the
ETN01 Ethernet Unit. Three methods are available. In the Automatic Address Generation
method, the IP address is derived by combining the ETN01's IP Network Address (e.g.
192.168.0.0) with the Node Number (e.g. 5) to get an IP Address (e.g. 192.168.0.5). In the IP
Address Table method, each Node Number maps to an IP Address via an entry in an IP Address
Table. In the Combined method, the IP Address Table is used first, but if the Node Number is not
found in the table, then the Automatic Address Generation method is used. See the Omron
ETN01 Ethernet Unit manual for details on these methods.
• Unit Number:
This value identifies the unit number on the rack of the remote node identified by the Network
Address and Node Number.
The RMC does not require manually setting these values in the RMC. Only the IP address needs
to be set in the RMC; see RMC Ethernet IP Address Setup for details. See the discussion below