DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

3. Instruction Set
Program Example 2:
Communication between PLC and VFD-B series AC motor drive (RTU Mode, M1143= ON)
M1002
MOV H87 D1120 Set communication protocol as 9600, 8, E, 1
SET
M1120
Retain communication protocol
MOV
K100
D1129
Sett receiving timeout as 100ms
X1
X0
M1127
SET M1143 Set as RTU mode
SET M1122 Sending request
MODRD K1 H2102 K2
Set communication instruction:
Data length: 2 words
Data address: H2102
Device address: 01
Processing received data
The received data is stored
in D1070~D1085 in HEX.
Receiving
completed
RST
M1127
Reset M1127
PLC → VFD-B , PLC transmits: 01 03 2102 0002 6F F7
VFD-B → PLC, PLC receives: 01 03 04 1770 0000 FE 5C
Registers for data to be sent (sending messages)
Register Data Descriptions
D1089 low byte 01 H Address of AC motor drive
D1090 low byte 03 H Command code of AC motor drive
D1091 low byte 21 H
D1092 low byte 02 H
Starting data address
D1093 low byte 00 H
D1094 low byte 02 H
Number of data (count by word)
D1095 low byte 6F H CRC CHK Low
D1096 low byte F7 H CRC CHK High
Registers for received data (responding messages)
Register Data Descriptions
D1070 low byte 01 H Address of AC motor drive
D1071 low byte 03 H Command code of AC motor drive
D1072 low byte 04 H Number of data (count by byte)
D1073 low byte 17 H
D1074 low byte 70 H
Content of address 2102 H
D1075 low byte 00 H
D1076 low byte 00 H
Content of address 2103 H
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