Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual Program Example 5 COM1 RS-232

3. Instruction Set

3.The forward running function of Delta’s VFD series inverter can also be set by handy instruction API 102 FWD instruction through COM2/COM3 on PLC.

Program Example 5: COM1 RS-232

1.Only 8-bit mode is supported. Communication format and speed are specified by lower 8 bits of D1036.

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 M1312 (COM1 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, M1312 will be automatically reset. (DO NOT apply RST M1312 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, M1314 will automatically be ON. When data processing on the received data is completed, M1314 has to be reset (OFF) and the PLC will be ready for communication again. However, DO NOT continuously execute RST M1314, i.e. it is suggested to connect the RST M1314 instruction after the drive contact M1314

M1002				Setting communication protocol as 9600,8,E,1
	MOV	H87	D1036
	SET	M1138	Retain communication protocol
	MOV	K100	D1249	Set up communication time out as 100ms
Pulse for

sending request

Pulse

X0

Write transmitting data in advance

SET M1312 Sending request

	RS	D100	K4	D120	K7
M1314
		Processing received data
		RST	M1314	Receiving completed and flag reset

Sending data: (PLC→External equipment)

D100L D101L D102L D103L

Source data register, starting from lower 8 bits of D100

Length = 4

3 - 2 0 9