SDP110
Air gap sensor
32
12 Troubleshooting
The unit has many self-diagnostic options. It monitors itself automatically during operation.
Warnings and error states are displayed even if the display is switched off. Error indications are also
available via IO-Link.
The status signals are classified according to NAMUR recommendation NE107.
If several diagnostic events occur simultaneously, only the diagnostic message of the event with the
highest priority is displayed.
If a process value fails, the other process values are still available. Exception: If the process value for
flow fails, no other process values are output.
Additional diagnostic functions are available via IO-Link
Ò
IO-Link interface description at
12.1 Error messages
Display
Problem/remedy
• Title line: ERROR
• Process value line: ERROR
Unit faulty / malfunction.
u
Replace the unit.
No display
• Supply voltage too low.
u
Check the supply voltage.
• Display switched off.
u
Check whether setting [diS.B] = OFF and change setting if
necessary.
• Title line: Running
• Process value line: NoData
Process value invalid.
u
Check process conditions.
• Title line: Parameter Error
• Process value line: PARA
Parameter setting outside the valid range.
u
Check parameter setting.
In the event of an error, the outputs react according to the setting under [FOU].
12.2 Warning messages
Display
Problem/remedy
• Title line: Short circuit OUT1/OUT2
• Process value line: ---
• Switching status LEDs for OUT1 and OUT2 flashing
Short circuit in both outputs.
u
Check OUT1 and OUT2 for short circuit or excessive
current.
• Title line: Short circuit OUT1
• Process value line: ---
• Switching status LED for OUT1 flashing
Short circuit output 1.
u
Check OUT1 for short circuit or excessive current.
• Title line: Short circuit OUT2
• Process value line: ---
• Switching status LED for OUT2 flashing
Short circuit output 2.
u
Check OUT2 for short circuit or excessive current.
• Title line: Under limit
• Process value line: UL
Setting range not reached.
u
Check the measuring range.
• Title line: Over limit
• Process value line: OL
Setting range exceeded.
u
Check the measuring range.
• Title line: ---
• Process value line: Lock via key
Setting keys on the unit locked, parameter change rejected.
u
Unlock unit.
