ARTHUR HOLM DynamicTalkH AHDTHS Gebruikershandleiding - Pagina 12
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AHNET PROTOCOL
Communications protocol
COMMUNICATION
CONNECTION
WIRING
Wiring Diagram
1. Data TX +
2. Data TX –
3. Data RX +
4. NC
5. NC
6 .Data RX
7. NC
8. NC
Connection
PINS 1 & 2
PINS 3 & 6
Protocol to control the unit by addressable RS422 bus.
You can connect up to 30 devices on the same RS422 bus.
You can use an AH Interface Ethernet, to control the RS422 bus.
The units should have a set address and the address must start by 1.
Maximum cable length between ends, 500 m/1640 ft.
AHnet protocol
Using 5 bytes communication:
BYTE 0
BYTE 1
BYTE 2
BYTE 3
BYTE 4
12
RS422
RJ45
CAT-6
The units respond
The units receive instructions
START BYTE
ADDRESS BYTE
COMMAND BYTE
VALUE 1
VALUE 2
Speed and configuration
BAUD RATE
DATA BITS
PARITY
STOP BITS
RJ-45
38400
8
NONE
1