Delta DVP-ES2/EX2/SS2/SA2/SX2/SE Program example 4 COM1RS-232 / COM3RS-485, Function Code H03

				3. Instruction Set
Register	Data		Descriptions
D6 low byte	03 H	address H2101		PLC COM2 automatically
				store the value in D1297
D7 low byte	0B H	Content of		0BB8 H
				PLC COM2 automatically
		address H2102
D8 low byte	B8 H
				stores the value in D1298
D9 low byte	0B H	Content of		0BB8 H
				PLC COM2 automatically
		address H2103
D10 low byte	B8 H
				store the value in D1299
D11 low byte	00 H	Content of		0000 H
				PLC COM2 automatically
		address H2104
D12 low byte	00 H
				store the value in D1300
D13 low byte	01 H	Content of		012D H
				PLC COM2 automatically
		address H2105
D14 low byte	2D H
				store the value in D1301
D15 low byte	8E H	CRC CHK Low
D16 low byte	C5 H	CRC CHK High

Program example 4: COM1(RS-232) / COM3(RS-485), Function Code H03

1.Function code K3 (H03): read multiple Word devices, up to 16 words can be read. For COM2 ASCII mode, only 8 words can be read..

2.PLC COM1 / COM3 stores the received data in registers starting from S, and the stored data can be transformed and moved by using DTM instruction for applications of other purposes.

3.Take the connection between PLC and VFD-B for example, the tables below explains the status when PLC reads VFD-B status. (M1320 = OFF, ASCII Mode ), (M1320 = ON, RTU Mode)

z If PLC applies COM1 for communication, the below program can be usable by changing:

1.D1109→D1036: communication protocol

2.M1136→M1138: retain communication setting

3.D1252→D1249: Set value for data receiving timeout

4.M1320→M1139: ASCII/RTU mode selection

5.M1316→M1312: sending request

6.M1318→M1314: receiving completed flag

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