Delta DVP-ES2 - Page 459

DVP-ES2/EX2/EC5/SS2/SA2/SX2/SE&TP Operation Manual - Programming
3-338
Program Example: COM2 (RS-485)
Communication between PLC and VFD-B series inverter (ASCII Mode, M1143 = OFF), Retry when
communication time-out occurs.
M1002
MOV H86 D1120
SET M1120
MOV
K100
D1129
RST
M1127
M1127
X0
FWD
K1 K500 K0
SET
M1122
M1129
X0
Retry when communication time-out occurs
Processing received data
Receiving completed
Communication instruction setting:
Device address: 1
Frequency: 500Hz
K0:normal forward
S e t u p communication protocol as
9600, 7, E, 1
Retain communication protocol
Set up communication time-out: 100ms
Sending request
Reset M1127
PLC  VFD, PLC sends: “:01 10 2000 0002 04 0012 01F4 C2 ”
VFD  PLC, PLC sends: “:01 10 2000 0002 CD ”
Data to be sent (sending messages)
Data
Descriptions
‘0’
30 H
ADR 1
Address of AC motor drive: ADR (1,0)
‘1’
31 H
ADR 0
‘1’
31 H
CMD 1
Command code: CMD (1,0)
‘0’
30 H
CMD 0
‘2’
32 H
Data Address
‘0’
30 H
‘0’
30 H
‘0’
30 H
‘0’
30 H
Data content
‘0’
30 H
‘0’
30 H
‘2’
32 H
‘0’
30 H
Byte Count
‘4’
34 H
‘0’
30H
Data content 1 H1: forward operation
‘0’
30 H
‘1’
31 H
‘2’
32 H
‘0’
30 H
Data content 2 Operation frequency = K500Hz H01F4
‘1’
31 H
‘F’
46 H
‘4’
34 H
‘C’
43 H
LRC CHK 1
Error checksum: LRC CHK (0,1)
‘2’
32 H
LRC CHK 0