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Using FINS Commands Section 3-2
1,2,3... 1. A FINS command sent from a PLC or computer on another network is
transmitted to the CPU Unit from the Backplane of the CPU Rack, via a
Communications Unit (Controller Link Unit, Ethernet Unit, etc.)
2. FINS commands sent from a host computer to a CPU Unit are sent with a
Host Link header code and a terminator (as in the Host Link communica-
tions mode).
The FINS commands available for CS/CJ/CP-series CPU Units and NSJ Con-
trollers fall into the following broad categories. (Refer to the relative operation
manuals for FINS commands addressed to other Units and Boards.)
• I/O memory area reading and writing
• Parameter area reading and writing
• Program area reading and writing
• Operating mode changes
• Machine configuration reading
• CPU Unit status reading
• Time data access
• Message reading and clearing
• Access rights acquisition and release
• Error log reading and clearing
• File operations
• Forced set/reset
Note When the Ethernet option board (CP1W-CF41) is used, a FINS command
issued from a PLC or computer on the network can be received via the
Ethernet option board, but cannot be issued via the Ethernet option board.
3-2 Using FINS Commands
FINS commands addressed to CPU units are issued to CS/CJ/CP-series
CPU units and NSJ Controllers by executing the instruction for the FINS com-
mand (SEND/RECV/CMND instruction) from a program of another PLC (CPU
unit) on the network.
Executing a FINS command addressed to a CPU unit can be used for the following:
• Issuing and using any command (CMND instruction)
• Using with respect to a host computer connected by Host Link
Communications
Unit
CS1-series
CPU Unit
Host computer
Serial communications (Host Link mode)
Communications Unit
CPU Unit
PLC on network
FINS command
Network (Controller Link, Ethernet, etc.)
Computer on network
Communications Board
FINS command
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