Delta DVP-ES2 User Manual download pdf (Page 449)

100

101

3. Instruction Set

3-333

3. In ASCII or RTU mode, when PLC’s COM2 sends out data, the data will be stored in

D1256~D1295. The feedback data will be stored in registers starting with S and converted into

D1296~D1311 in Hex automatically.

4. Take the connection between PLC1 (PLC COM2) and PLC2(PLC COM1) for example, the

tables below explains the status when PLC1 reads Y0~Y17 of PLC2.

H87MOV

M1002

D1120

SET M1120

K100

MOV

D1129

RST M1127

Set communication protocol as 9600, 8, E, 1

Retain communication protocol

Set communication timeout as 100ms

MODRW

H0500 D0 K16

Connection device

address K1

Function code K2

read multiple bits

Data address Y0=H0500

Data storing register

Data length (bit)

Processing received data

ASCII mode: The received data is stored in registers starting from D0 in ASCII format and

PLC converts the content to hexadecimal automatically.registers D1296~D1311 in

RTU mode: The received data is stored in registers starting from D0 in Hex.

Reset M1127

M1127

SET

M1122

Sending request

M1143 = OFF

ASCII mode

RST

M1143

M1143 = ON

RTU mode

SET

M1143

Receiving completed

ASCII Mode (M1143 = OFF):

When X0 = ON, MODRW instruction executes the function specified by Function Code 02.

PLC1Ö PLC2，PLC1 sends: “01 02 0500 0010 E8”

PLC2 ÖPLC1，PLC1 receives: “01 02 02 3412 B5”

Registers for data to be sent (sending messages)

D1256 Low ‘0’ 30 H ADR 1

D1256 High ‘1’ 31 H ADR 0

Device address: ADR (1,0)

D1257 Low ‘0’ 30 H CMD 1

D1257 High ‘2’ 32 H CMD 0

Control parameter: CMD (1,0)

D1258 Low ‘0’ 30 H

D1258 High ‘5’ 35 H

D1259 Low ‘0’ 30 H

D1259 High ‘0’ 30 H

Y0 = H0500

Starting Data Address

1 2 ... 444 445 446 447 448 449 450 451 452 453 454 ... 701 702

Delta DVP-ES2 User Manual Page 449

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