•
Maximum Polling Rate sets the minimum wait time from the end of a Modbus transaction to the beginning of the
next Modbus transaction.
The Modbus Slave port settings include:
•
Baud rate and parity (also set on this screen)
•
Set the Modbus Slave port ID using the DXM Controller 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.
5.5.2 Modbus Slave Port ID
Set the DXM Modbus slave port using the LCD menu system. On the LCD,
use the down arrow to highlight System. Enter the System menu by
clicking Enter.
Banner Eng
08:25:45
→
Registers
→
Push
S
→
08:25:15
→
ISM Radio
→
System
→
System Info
↑
↓
ENTER
BACK
To change the DXM Slave ID, highlight DXM Slave ID, then click Enter.
System
08:25:45
→
DXM Slave ID: 255
→
Provision Cell
→
Power: [dc / solar]
→
Restart
→
LCD Contrast: 28
→
Ethernet
→
ISM Radio
ISM Radio
08:25:45
ISM Type: MultiHop
ISM Modbus ID: 1
ISM Radio
08:25:45
Updated! A device
to take effect.
<Ent> Restart
<Back> Previous Menu
restart is needed
ISM Type
08:25:45
ISM Type: MultiHop
Change Type
<Ent> Accept Type
<Back> Previous Menu
ISM ID
08:25:45
ISM Modbus ID:
Change Modbus ID #
<Ent> Accept ID
<Back> Previous Menu
>> 1
Use the up and down arrow buttons to change the DXM Slave ID.
Press Enter to accept the ID change.
After you change the DXM Slave ID, use the DXM Configuration Tool to cycle power to the device. After cycling power to
the device, the updated DXM Slave ID is listed under the System menu.
5.6 Inputs and Outputs
The I/O base board is a Modbus slave device (Slave ID 200) that communicates to the processor board using Modbus
commands. Use the DXM Configuration Tool to create a configuration using read/write maps that will access inputs or
outputs on the I/O board.
Communication with the I/O board runs at a maximum rate of 10 ms per transaction. The parameter setting for the bus
with the I/O 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.
DXM100-Bx Wireless Controller Instruction Manual
28
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