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SECTION 5
FINS Communications
This section provides information on communicating on Ethernet Systems and interconnected networks using FINS
commands. The information provided in the section deals only with FINS communications in reference to Ethernet Units.
FINS commands issued from a PC are sent via the SEND(090), RECV(098), and CMND(490) instructions programmed
into the user ladder-diagram program. Although an outline of these instructions is provided in this section, refer to the CS/
CJ-series Programmable Controllers Programming Manual (W340) for further details on programming these instructions.
5-1 Overview of FINS Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
5-1-1 Communications On an Ethernet Network. . . . . . . . . . . . . . . . . . . . 80
5-1-2 FINS Communications Service Features . . . . . . . . . . . . . . . . . . . . . 80
5-2 Procedure Before Using FINS Communications . . . . . . . . . . . . . . . . . . . . . . 82
5-3 Sending Commands From a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5-3-1 Communications Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5-3-2 Program Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
5-3-3 Transmission Delays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
5-4 Sending Commands From a Host Computer . . . . . . . . . . . . . . . . . . . . . . . . . 96
5-4-1 Designating Remote Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
5-4-2 FINS Frames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
5-4-3 Sample Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
5-4-4 Delays for Accessing PC Memory . . . . . . . . . . . . . . . . . . . . . . . . . . 101
5-5 FINS Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102