Delta DVP-ES2 User Manual download pdf (Page 465)

100

101

3. Instruction Set

3-349

RTU mode (M1143 = ON)

When X0 = ON, MODRW instruction executes the function specified by Function Code 06

PLC Ö VFD-B, PLC sends: “01 06 2000 1770 8C 1E”

VFD-B → PLC, PLC receives: “01 06 2000 1770 8C 1E”

Registers for data to be sent (sending messages)

D1256 Low byte 01 H Address

D1257 Low byte 06 H Function

D1258 Low byte 20 H

D1259 Low byte 00 H

Data Address

D1260 Low byte 17 H

D1261 Low byte 70 H

Data

content

H1770 = K6000.

The content of register D50

D1262 Low byte 8C H CRC CHK Low

D1263 Low byte 1E H CRC CHK High

Registers for received data (responding messages)

D1070 Low byte 01 H Address

D1071 Low byte 06 H Function

D1072 Low byte 20 H

D1073 Low byte 00 H

Data Address

D1074 Low byte 17 H

D1075 Low byte 70 H

Data content

D1076 Low byte 8C H CRC CHK Low

D1077 Low byte 1E H CRC CHK High

Program example 8: COM1 (RS-232) / COM3 (RS-485), Function Code H06

1. Function code K6 (H06): Write in single Word device.

2. Set the value to be written into VFD-B in the register specified by operand S.

3. PLC COM1/COM3 will not process the received data.

4. Take the connection between PLC (PLC COM3) and VFD-B for example, the tables below

explains the status when PLC COM3 writes in single Word device in VFD-B (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

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Delta DVP-ES2 User Manual Page 465

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