Mitsubishi FX3U Series User Manual page 105

FX Series Programmable Controllers
3U
User's Manual - MODBUS Serial Communication Edition
M1
ADPRW
M8029 M8402
M2
ADPRW
M8029 M8402
M3
ADPRW
M8029 M8402
M8000
P0
H4 H3 K10 K5
CALL
RST
SET
H4 H0F K32 K16
CALL
RST
SET
H4 H10 K0 K4
CALL
RST
D8402
MOV
D8403
MOV
D8404
MOV
11.1 Setting Program for Master Station
Read Holding Registers Command
D20
Command Complete Processing
P0
When Error Flag is ON, call Error Handing
Routine
M1
Reset Read Holding Registers Command
M2
Set Next Command in Sequence
X000
Write Coils Command
Command Complete Processing
P0
When Error Flag is ON, call Error Handing
Routine
M2
Reset Write Coil Command
M3
Set Next Command in Sequence
D1000 Write Registers Command
Command Complete Processing
P0
When Error Flag is ON, call Error Handing
Routine
M3
Reset Write Registers Command
FEND
End MODBUS Command Sequence
Error Processing Routine
D4000
Store MODBUS Error Code to D4000
D4001
Store MODBUS Error Details to D4001
D4002
Store MODBUS Error Step # to D4002
SRET
End Error Processing Routine
11 Practical Program Examples
101
11
12