Communication Format Setting [D8120 And D8420] - Mitsubishi Electric FX3U-232-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
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2. Cautions on use
Error codes are not cleared even after communication recovers its normal status.
Serial communication errors are cleared in FX
turned off and on.
Serial communication errors are cleared in other PLCs when the mode is switched from STOP to RUN.
9.2.8

Communication format setting [D8120 and D8420]

These devices set the serial communication format.
1. Detailed contents
These devices set the serial communication format. In FX
FX and FX
3U 3UC
turned ON.
In FX (FX), FX
2
ON the power.
In all PLCs except FX
Set the communication format using parameters when using the communication port ch2 in FX
FX and FX
3U 3UC
Use D8420 for confirmation.
The tables below show the setting details.
• Contents of D8120
Bit No.
b0
b1
b2
b3
b4
b5
b6
b7
b8
b9
b10
b11
b12
b13
b14
b15
*1. This setting is available only in FX
D-94
PLCs, the contents set in parameters are transferred to these devices when the power is
and FX PLCs, set the communication format using a sequence program, and then turn
2C 0N
, FX , FX and FX
3G 3GC 3U
PLCs.
Name
Data length
b2, b1
(0, 0): Not provided
Parity
(0, 1): Odd
(1, 1): Even
Stop bit
b7, b6, b5, b4
(0, 0, 1, 1): 300
Baud rate
(0, 1, 0, 0): 600
(bps)
(0, 1, 0, 1): 1200
(0, 1, 1, 0): 2400
Header
Terminator
Com- b11, b10
Control line puter (0, 0): RS-485/RS-422 interface
link (1, 0): RS-232C interface
Sum check
Protocol
Control
procedure
, FX , FX , FX
3S 3G 3GC
, FX
1S 1N
PLCs using communication port ch1, use D8120.
3UC
Contents
0 (bit = OFF)
7-bit
1-bit
b7, b6, b5, b4
(0, 1, 1, 1): 4800
(1, 0, 0, 0): 9600
(1, 0, 0, 1): 19200
(1, 0, 1, 0): 38400
Not provided
Not provided
Not applicable
Not added
Not used
Format 1
, FX , FX , FX and FX
3S 3G 3GC 3U
9.2 Details of Related Devices
and FX PLCs when the power is
3U 3UC
, FX , FX , FX , FX
1NC 2N 2NC
1 (bit = ON)
8-bit
2-bit
*1
Provided (D8124) Initial value: STX (02H)
Provided (D8125) Initial value: ETX (03H)
Added
Used
Format 4
PLCs.
3UC
9 Related Data
, FX , FX ,
3S 3G 3GC
, FX ,
3G 3GC