ARTHUR HOLM AHDTLM UC Manuel de l'utilisateur - Page 10

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AHnet protocol

Communication type : RS422

•

Connection type : RJ45

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Wiring type : CAT-5

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Speed and configuration :

•

Baud Rate = 38400

–

Data Bits = 8

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Parity = None

–

Stop Bits = 1

–

Wiring diagram

Pins 1&2: the units answer

Pins 3&6: the units receive orders

Protocol to control the device by addressable RS422 bus. You can connect

up to 30 dvices on the same RS422 bus. You can use a AH Interface

Ethernet, to control the RS422 bus. The units should have set address and

the address must start by 1. Maximum cable length between ends, 500m

AHnet Protocol:

Using 5 bytes to communication:

BYTE 0

START BYTE

BYTE 1

ADDRESS BYTE

BYTE 2

COMMAND BYTE

BYTE 3

VALUE 1

BYTE 4

VALUE2

Data TX+

Data TX-

Data RX+

Data RX-