February 02, 2024
DXM1200-X2 Controller Instruction Manual
© Banner Engineering Corp. All rights reserved.
51
Chapter Contents
Assigning Modbus IDs........................................................................................................................................................................................ 52
Modbus Operation.............................................................................................................................................................................................. 52
Wireless and Wired Devices .............................................................................................................................................................................. 52
Modbus Communication Timeouts ..................................................................................................................................................................... 53
Modbus TCP Client ............................................................................................................................................................................................ 54
The DXM Controller has two physical RS-485 connections using Modbus RTU protocol.
The client Modbus RS-485 port is for the DXM Controller to act as a Modbus client device to control internal and external
Modbus server devices. The Modbus client RS-485 port uses the white (+) and black (-) wires on the M12 quick disconnect
connector.
DXM Controller system overview
Ethernet
RS-485 (client)
Internal
Micro USB
Processor/Outputs (Base Board)
Local Registers
(Modbus ID 199)
Processor Controller
ISM Radio (Modbus ID 1)
User Display (Modbus ID 201)
Local Registers
Integer
Local Registers
Float
Local Registers
Non-Volatile
Cellular Modem
Modbus Data Traffic
Control
Gateway or MultiHop
LCD / LED
The DXM Controller operates the Modbus client port. Each device on the client port must be assigned a unique server ID.
There are server IDs that are reserved for internal devices in the DXM Controller.
DXM internal Modbus IDs (factory default)
Modbus ID
Device
1
DX80 Performance Gateway or MultiHop ISM Radio—MultiHop wireless devices connected to the internal MultiHop radio
should be assigned Modbus IDs starting at 11.
199
Local Registers—Internal storage registers of the
DXM Controller
201
LCD—The user has access to the LED indicators on the
DXM Controller
.
Working with Modbus Devices
Chapter 7
Summary of Contents for DXM1200-X2
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