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

3. Instruction Set
Program Example 3:
1. In the communication between PLC and VFD-B series AC motor drive (ASCII Mode, M1143 =
OFF), executes Retry when communication time-out, data receiving error or parameter error
occurs
2. When X0 = ON, PLC will write data H1770 (K6000) into address H0100 in device 01 (VFD-B).
3. M1129 will be ON when communication time-out occurs. The program will trigger M1129 and
send request for reading the data again.
4. M1140 will be ON when data receiving error occurs. The program will trigger M1140 and send
request for reading the data again.
5. M1141 will be ON when parameter error occurs. The program will trigger M1141 and send
request for reading the data again.
M1002
MOV H87 D1120 Set communication protocol as 9600, 8, E, 1
SET
M1120
Retain communication protocol
MOV K100 D1129
Set communication timeout as 100ms
X0
SET
M1122
Sending request
M1129
M1140
M1141
X0
Retry when communication time-out occurs
Retry when data receiving error occurs
Retry when parameter error occurs
MODWR K1 H0100 H1770
Receiving completed
M1127
Processing received data
Set communication instruction:
Data: H1770
Data address: H0100
Device address: 01
The received data is stored in D1070-D1085
i n ASCII format .
RST
M1127
Reset M1127
M1129
RST
M1129
Reset M1129 (receiving timeout)
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