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• Set the Modbus Slave port ID using the DXM700 LCD
• Set the Wireless Modbus Backbone parameter when there is an ISM radio plugged into the SAM4 processor board
and the Modbus slave port is using the MultiHop radio as the slave port instead of the terminal block connection.
4.7.2 DXM Modbus Slave Port ID
Set the DXM Modbus slave port ID using the LCD menu system.
1. On the LCD, use the down arrow to highlight System Config. Click the Enter button.
2. Highlight DXM Modbus ID and click Enter.
3. Use the up and down arrow buttons to change the DXM Modbus Slave Port ID.
4. Press Enter to accept the ID change.
5. Use the DXM Configuration Tool to cycle power to the device.
After cycling power to the device, the updated DXM Modbus ID is listed under the System Config menu.
4.8 Outputs
The base board is a Modbus slave device (Slave ID 203) that communicates to the processor using Modbus commands.
Use the DXM Configuration Tool to create write maps that will access outputs on the board.
Communication with the board runs at a maximum rate of 10 ms per transaction. The parameter setting for the bus with the
board and the processor board are fixed. External Modbus communication runs at a maximum rate of 50 ms per
transaction. The parameter settings for the external RS-485 buses are controlled by the DXM Configuration Tool.
Refer to the Modbus Registers section for more descriptions of each Modbus register on the DXM700-Bx Wireless
Controller.
4.8.1 Modbus I/O Registers for the Base Board
Modbus Registers for the Base Board Outputs (Modbus Slave ID
203
)
Modbus Register
Range
Description
2101
0–1
PNP Output 1
2102
0–1
PNP Output 2
2103
0–1
PNP Output 3
2104
0–1
PNP Output 4
Sure Cross
®
DXM700-Bx Wireless Controller
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