Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Fe H, Modrd K1

DVP - ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming

Register	Data	Descriptions
D1077 low byte	FE H	CRC CHK Low
D1078 low byte	5C H	CRC CHK High

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 read the data of address H2100 in device 01(VFD-B) and stores the data in ASCII format in D1070 ~ D1085. PLC will automatically convert the data and store them in D1050 ~ D1055.

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				Set communication protocol as 9600, 8, E, 1
	MOV	H87	D1120
	SET	M1120	Retain communication protocol
	MOV	K100	D1129	Set communication time-out as 100ms
X0			Sending request
	SET	M1122

M1129

Retry when communication time-out occurs

M1140

Retry when data receiving error occurs

M1141

Retry when parameter error occurs

X0

MODRD K1 H2100 K 6

Receiving completed

Set communication instruction: Data length: 6 words

Data address: H2100

Device address: 01

M1127

M1129

The received ASCII data is stored in D1070-D1085 Handle received data and PLC converts the data and store them into

D1050-D1055 automatically.

RST	M1127	Reset M1127
RST	M1129	Reset M1129 (receiving timeout)

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