7.3.3 1:N Communication (Computer Link)
Overview
For a 1:N computer link, the computer and the FP-X are connected through a commercially available
RS232C-RS485 converter, and the respective PLCs are wired using an RS485 cable.
The computer and the PLC communicate via commands and responses: The computer sends a
command specifying the unit number, and the PLC with that unit number sends a response back to the
computer.
Note) Lineeye SI-35 is recommended to be used as a converter.
Setting system registers
Setting of COM1 port
No.
Name
Set value
No. 410 Unit number for COM1 port
1 to 99 (Set the desired unit number)
(With a C-NET adapter, a maximum of
32 units (stations) can be specified.)
No. 412 Selection of communication mode for COM1 port Computer link
No. 413 Communication format for COM1 port
Data length: ……
Parity check: …..
Stop bit: …………
Terminator: ……..
Header: …………
7 bits/8 bits
None/Odd/Even
1 bit/2 bit
CR
STX not exist
No. 415 Baud rate setting for COM1 port
Note3)
2400 to 115200 bps
Note1) The communication format and baud rate (communication speed) should be set to match the
connected computer.
Note2) The terminal units of the AFPX-COM3, AFPX-COM4 and AFPX-COM6 are specified by the dip
switch in the communication cassette.
Note3) The baud rates of 300, 600 and 1200 bps can be specified by the SYS1 instruction. However, the
setting value of the system register cannot be changed.
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Summary of Contents for AFPX-C30R
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