Mitsubishi RS232/485/LAN Serial Communication Control Manuel Page 66

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Chapter 2 Connection to a PLC
2-66
2.4.6 MELSEC-FX Series
Item Setting
Communication Interface RS-232C/RS-422
Data Bits 7 (fixed)
Baud Rate 9600 bps (fixed)
Parity Even (fixed)
Stop Bits
Use the same
settings as for
the MICRO/I.
1 (fixed)
When using CPU Direct for the connection, the PLC program scan time will increase when it
starts communicating with the MICRO/I. Investigate this under your actual operating
conditions.
To connect MELSEC-FX series PLC and MICRO/I, check the following two things.
- Uncheck the communication setting by the programming software.
- Data Register 8120 (D8120) must be 0.
If the PLC is MELSEC-FX3U or MELSEC-3UC, check the following two thins too.
- If MICRO/I connects to CH1 on the PLC, Data Register 8400 (D8400) must be 0.
- If MICRO/I connects to CH2 on the PLC, Data Register 8420 (D8420) must be 0.
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