7-29
7.4.3 1:N Communication (Computer Link)
Overview
For a 1:N computer link, the computer and the FP
Σ
are connected through a commercially available
RS232C-RS485 conversion adapter, 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.
When data is transmitted from FP
Σ
via the RS485 communication of AFPG806 (COM4), start the
transmission of the data to FP
Σ
after the time mentioned blow passes at a receiver.
In case of 19200 bps: 1 ms In case of 115200 bps: 200µs
Note) Lineeye SI-35 is recommended to be used as a conversion adapter.
Setting system registers
Setting of COM1 port
No.
Name
Set value
No. 410
COM1 port unit number
1 to 99 (Set the desired unit number)
(With a C-NET adapter, a maximum of
32 units (stations) can be specified.)
No. 412
COM1 port selection of communication mode
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
2400 to 115200 bps
Note1) The communication format and baud rate (communication speed) should be set to match the
connected computer.
Note2) The RS485 port of the AFPG806 is either 19200 bps or 115200 bps only.
Also the baud rate must be identically set by the system register and the dip switch in the
communication cassette.
Reference:
<7.1.4 Setting of AFPG806 Switch>
Note3) Setting the unit number setting switch to 0 makes the system register settings valid.
Note4) Connect the “
−
“ terminal and the “E” terminal with a lead wire to make the termination resistance
of the AFPG803 effective.
The termination resistance of the AFPG806 is specified by the dip switch located in the
communication cassette.
Содержание FP E Series
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Страница 17: ...Chapter 1 Functions and Restrictions of the Unit ...
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Страница 37: ...2 9 Circuit diagram C32 Y0 Y1 Y3 Y4 C28 Y0 Y1 Y3 Y4 Y2 Y5 to YF Y2 Y5 to YB ...
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Страница 49: ...Chapter 3 Expansion ...
Страница 56: ...3 8 Terminal layout diagram Note The numbers in the connector are for the first expansion ...
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Страница 202: ...7 52 Procedure of communication In the following example the Micro Imagechecker is connected to COM1 port ...
Страница 210: ...7 60 The values of DT50 and DT51 are written in DT0 and 1 of PLC ...
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