8.6 Using the Display LEDs
Turn on the DXM Controller LEDs by writing to the LEDs' Modbus registers.
The DXM display uses Modbus slave ID 201 and has four individual
registers for each of the four LEDs on the display.
Turn on an LED by writing a 1 value to the register. Turn off the LED by
writing a 0 to the register.
Do not write to any other Modbus registers. They are used by the LCD
display for menu data.
Display Modbus
Register
Display LED
1102: bit 0
LED 1 (Green)
1103: bit 0
LED 2 (Red)
1104: bit 0
LED 3 (Yellow)
1105: bit 0
LED 4 (Red)
DXM Controller Display Example
This example shows setting up the DXM Controller using the DXM Configuration Tool to read four universal inputs and
write the state values to the display LEDs.
1. Using the DXM Configuration Tool, go to the Local Registers > Local Register Configuration screen.
2. Define the local registers by assigning names to the first four registers and setting the LCD permissions parameter
to read/write. The LCD permissions show the register contents on the LCD menu under the REGISTER menu. You
can also set the value from the LCD menu.
3. Create a Read Rule to read the four universal inputs from the I/O board (Modbus slave 200) and write the values in
local registers 1 through 4.
4. Create a Write Rule to write the four local register values to the DXM display registers 1102 through 1105 (Modbus
Slave 201). Define the Write Rule to only write the display registers when the inputs change.
DXM100-Bx Wireless Controller Instruction Manual
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