Mitsubishi Electric FX2N-485-BD, User Manual

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4.2
Communication Format D8120
To send and receive the data between the RS485 (422) unit using the 485BD, the communication format including the
transmission speed (baud rate) and the parity must be consistent between the 485BD and the RS485 unit.
The communication format can be set using the parameters or the contents of the special data register D8120 of the FX
2N
programmable controller. Make sure to set appropriately the communication format in accordance with the RS485 (422) unit
used. For the setting method using the parameters of the FX
2N
programmable controller, refer to the manual of the peripheral
unit used.
Make sure to turn off the power of the programmable controller and turn it on again after modifying the setting.
Bit No. Meaning
Contents
0 (OFF) 1 (ON)
b0
Data length 7 bit 8 bit
b1
b2 Parity
b2,b1 b2,b1
(0, 0) : None (1, 1) : Even
(0, 1) : Odd
b3 Stop bit 1 bit 2 bit
b4
b5
b6
b7
Baud rate
(bps)
b7,b6,b5,b4 b7,b6,b5,b4
(0, 0, 1, 1) : 300 (0, 1, 1, 1) : 4,800
(0, 1, 0, 0) : 600 (1, 0, 0, 0) : 9,600
(0, 1, 0, 1) : 1,200 (1, 0, 0, 1) : 19,200
(0, 1, 1, 0) : 2,400
4
FX
2N
-485-BD COMMUNICATION BOARD COMMUNICATION FORMAT
4-2