ATIM ACW-DI2/868 Installationshandbuch - Seite 4

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MODBUS TABLE

0x00 (0)

0x40 (64)

0x41 (65)

0x42 (66)

0x43 (67)

Supported Modbus functions :

0x03 (3)

0x10 (16)

MODBUS MASTER FRAME FORMAT

SLAVE ID

FUNC

START ADDR

Slave Id

Code Function

Start Address

Quantity of registers

Bytes count

Counter 1 MSB-LSB

Counter 2 MSB-LSB

CRC

Modbus Address

Function

REG QTY

BYTES

COUNT

1 octet

Modbus Slave ID

1 octet

0x10 (Write multiple registers)

2 octets

MSB = 0x40, LSB=Slave Id

2 octets

Number of registers to write

1 octet

Number of bytes to write

4 octets

Input 1 counter

4 octets

Input 2 counter

2 octets

Error control code

FRQIG_ACW-DI/868

Reading digital inputs

b0: state input 1

b1: state input 2

Read and write input 1 counter (b31 à b16)

Read and write input 1 counter (b15 à b0)

Read and write input 1 counter 2 (b31 à b16)

Read and write input 1 counter 2 (b15 à b0)

Reading of several registers

Writing of several registers

COUNTER 1

MSB

LSB

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Data

Type

COUNTER 2

MSB

LSB

40001

0004

00000012

00000008

XXXX

CRC