IFM SU2020 - Error Messages

SU2020 SU8020 SU2021 SU8021 SU2621 SU8621 Ultrasonic flow meter
54
Display indication LED display Problem/remedy
• Title line: 
• Process value line:  IO-Link
• Switching status LEDs: flash yellow
rapidly
IO-Link function for optical identification
of the active unit.
u Deactivate IO-Link function.
• Title line: Simulation
• Process value line: ---
• Operating status LED: Lights green Simulation active.
u End simulation.
• Title line: Lock via key
• Process value line: ----
Setting keys on the unit locked, parame-
ter change rejected.
u Unlock the unit using the keys.
• Title line: Lock via system
• Process value line: ---
Setting keys locked via parameter set-
ting software, parameter change reject-
ed.
u Unlock the unit via IO-Link interface
using the parameter setting software.
• Title line: Lock via
communication
• Process value line: ---
Parameter setting via keys locked, pa-
rameter setting is active via IO-Link
communication.
u Finish parameter setting via IO-Link
communication.
In the event of a warning, the outputs react according to the setting under [FOU] = OU.
Exception: Short circuit.
12.2 Error messages
Display indication LED display Problem/remedy
• Title line: Hardware error
• Process value line: ERROR
• Operating status LED: Lights red Unit faulty / malfunction.
u Replace the unit.
• Title line: Signal error
• Process value line: NO SIGNAL
• Operating status LED: flashes red No medium present or signal quality too
low due to interference in the pipe
length.
u Check whether medium is present in
the sensor tube.
u Remove unit and check for deposits.
u Check application for interference (air
bubbles/particles).
• Title line: Parameter error
• Process value line: PARA
• Operating status LED: flashes red Parameter setting outside the valid
range.
u Check parameter setting.
• Title line: Critical over limit
• Process value line: cr.OL
• Operating status LED: flashes red Above the measuring range.
u Check the measuring range.
• Title line: Critical under limit
• Process value line: cr.UL
• Operating status LED: flashes red Below the measuring range.
u Check the measuring range.
In the event of an error, the outputs react according to the setting under [FOU].