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

3. Instruction Set
Program Example:
Connect PLC to VFD series AC motor drive (ASCII mode, M1143 = OFF), (8-bit mode, M1161 = ON),
Write the data to be sent into registers starting from D100 in advance for reading 6 data from
address H0708 on VFD.
M1002
MOV
H86
D1120
Set up communication protocol to 9600, 7, E, 1
SET
M1120
Retain communication protocol
MOV K100 D1129 Set up communication time-out: 100ms
Sending request pulse
Write data to be sent in advance
pulse
SET M1122 Sending request
X10
RS D100 K17 D120 K35
Receiving completed
Processing received data
M1123
RST M1123 Reset M1123
PLC VFD, PLC sends: “: 01 03 07 08 0006 E7 CR LF ”
Registers for sent data (sending messages)
Register Data Explanation
D100 low byte ‘: ’ 3A H STX
D101 low byte ‘0’ 30 H ADR 1
Address of AC motor
D102 low byte ‘1’ 31 H ADR 0
drive: ADR (1,0)
D103 low byte ‘0’ 30 H CMD 1
Command code:
D104 low byte ‘3’ 33 H CMD 0
CMD (1,0)
D105 low byte ‘0’ 30 H
D106 low byte ‘7’ 37 H
D107 low byte ‘0’ 30 H
Starting data address
D108 low byte ‘8’ 38 H
D109 low byte ‘0’ 30 H
D110 low byte ‘0’ 30 H
D111 low byte ‘0’ 30 H
Number of data (words)
D112 low byte ‘6’ 36 H
D113 low byte ‘E’ 45 H LRC CHK 0 Error checksum: LRC
D114 low byte ‘7’ 37 H LRC CHK 1 CHK (0,1)
D115 low byte CR D H
D116 low byte LF A H
END
The error checksum LRC CHK (0, 1) can be calculated by LRC instruction (8-bit mode, M1161 =
ON).
M1000
LRC D101 K12 D113
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