3. Instruction Set
3-275
Registers for received data (responding messages)
Register Data Descriptions
D1070 low ‘0’ 30 H ADR 1
D1070 high ‘1’ 31 H ADR 0
D1071 low ‘0’ 30 H CMD 1
D1071 high ‘6’ 36 H CMD 0
D1072 low ‘0’ 30 H
D1072 high ‘1’ 31 H
D1073 low ‘0’ 30 H
D1073 high ‘0’ 30 H
Data address
D1074 low ‘1’ 31 H
D1074 high ‘7’ 37 H
D1075 low ‘7’ 37 H
D1075 high ‘0’ 30 H
Data content
D1076 low ‘7’ 37 H LRC CHK 1
D1076 high ‘1’ 31 H LRC CHK 0
Program Example 2:
Communication between PLC and VFD-B series AC motor drives (RTU Mode, M1143 = ON)
MOV D1120H87
M1002
SET M1120
Set communication protocol as 9600, 8, E, 1
Retain communication protocol
Set receiving timeout as 100ms
Sending request
X1
M1127
RST M1127
Receiving
completed
Process of receiving data
Reset M1127
The receiving data is stored in
D1070~D1085 in Hex.
Set as RTU mode
X0
Set communication instruction:
Data address: H2000
Write in data H12
Device address: 01
MOV D1129
K100
SET M1143
SET M1122
MODWR H2000K1 H12
PLC → VFD-B, PLC transmits: 01 06 2000 0012 02 07
VFD-B → PLC, PLC receives: 01 06 2000 0012 02 07
