Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Receving data External equipment→PLC

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

Receving data: (External equipment→PLC)

D120L D121L D122L D123L D124L D125L D126L

Registers for received data, starting from lower 8 bits of D120

Length = 7

Program Example 6: COM3 RS-485

1.Only 8-bit mode is supported. Communication format and speed are specified by lower 8 bits of D1109.

2.STX/ETX setting function (M1126/M1130/D1124~D1126) is not supported.

3.High byte of 16-bit data is not available. Only low byte is valid for data communication.

4.Write the data to be transmitted in advance into registers starting from D100 and set M1316 (COM3 sending request) as ON

5.When X10 = ON, RS instruction executes and PLC is ready for communication. D0 will then start to send out 4 data continuously. When data sending is over, M1318 will be automatically reset. (DO NOT apply RST M1318 in program). After approximate 1ms, PLC will start to receive 7 data and store the data in 7 consecutive registers starting from D20.

6.When data receiving is completed, M1318 will automatically be ON. When data processing on the received data is completed, M1318 has to be reset (OFF) and the PLC will be ready for communication again. However, DO NOT continuously execute RST M1318, i.e. it is

suggested to connect the RST M1318 instruction after the drive contact M1318.

M1002				Setting communication protocol as 9600,8,E,1
	MOV	H87	D1120
	SET	M1136	Retain communication protocol
	MOV	K100	D1252	Set up communication time out as 100ms
Pulse for

sending request

Pulse

X0

Write transmitting data in advance

SET M1316 Sending request

	RS	D100	K4	D120	K7
M1318
		Processing received data
		RST	M1318	Receiving completed and flag reset

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