Delta DVP-ES2 User Manual download pdf (Page 326)

100

101

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

3-210

Receving data: (External equipment→PLC)

D120L D122L D123L D124L D125L D126LD121L

Registers for r starting from

lower 8 bits of D120

eceived data,

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

Receiving completed and flag reset

Setting communication protocol as 9600,8,E,1

Retain communication protocol

Set up communication time out as 100ms

M1002

MOV H87 D1120

SET M1136

MOV K100 D1252

D100

D120

M1318

Processing received data

RST M1318

Pulse for

sending request

Pulse

Write transmitting data in advance

Sending request

SET

M1316

1 2 ... 321 322 323 324 325 326 327 328 329 330 331 ... 701 702

Delta DVP-ES2 User Manual Page 326

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