Turn bus termination on / off: turn on
1. press the button 3 times
LED flashing and flickering stops (termina-
tion mode)
2. press the button 1 time shortly
LED flashes blue 1 time
3. press the button until LED shines red
LED shines red (confirmation)
4. release the button
LED off
Address display
LED flashes blue 1 time after address
display
Normal operation
Turn bus termination on / off: turn off
1. press the button 3 times
LED flashing and flickering stops (termina-
tion mode)
2. press the button until LED shines red
LED shines red (confirmation)
3. release the button
Normal operation
Enter Modbus address with push-button
Press and hold button between 1 and 5
seconds
See description in section
Reset to factory settings
Press and hold the button for longer than
10 seconds
Orange LED flashes
3.2.2
LED colors and patters
Colour
Pattern
Description
Green
1 second on / 5 seconds off
Normal operation ("life pulse") without bus
traffic
flashing
Normal operation ("life pulse") with bus
traffic
Orange /green
1 second orange / 1 second green
Device is in override control
Orange
1 second on / 1 second off
Bus parameters not yet configures
1 second on / 5 seconds off
Backup mode entered
Red
Steady
Mechanical fault, device jammed or
manual override
1 second on / 5 seconds off
Internal error
0.1 second on / 1 second off
Invalid configuration, e.g. Min = Max
Blue
Flashes 1 time after address display
Bus termination is set active
3.2.3
Resetting the device by push button
1. Press and hold the button for longer than 10 seconds: LED starts flashing orange.
2. Release the button while LED still flashes: LED keeps flashing for 3 seconds.
3. If the button is pressed within these 3 seconds, the reset is cancelled.
4. After those 3 seconds: LED shines red (reset), then the device restarts.
See section
for more information and examples.
3.3 Push button addressing
The Modbus address can be set without a separate tool by using push-button and LED. To display the
current address, press button < 1 second.
10
RDAS…-24C variable list, Rev. A