Alarm Codes - ABB TZIDC Operating Instructions Manual

42 TZIDC DIGITAL POSITIONER | OI/TZIDC-EN REV. B
... 9 Diagnosis / error messages

Alarm codes

Alarm code Possible cause
Leakage between positioner and actuator
The setpoint current is outside the
permissible range, i.e. it is < 3.8 mA or
> 20.5 mA.
Alarm of the zero monitor. The zero position
has shifted by more than 4 %.
Controlling is inactive, because the device
does not operate in control mode or the
binary input is active.
Positioning timed out. The settling time
needed exceeds the configured stroke time.
The defined limit value for the stroke counter
has been exceeded.
The specified limit value for the travel counter
has been exceeded.
Impact
Depending on how well the leakage can be
compensated, small control actions are
required at regular intervals.
–
–
In control mode, a position outside the valve
range can only be reached by moving to the
limit stops, as the setpoint is limited from
0 to 100 %
The controller does not follow the setpoint.
None, or adaptive control is performed (in
adaptive mode).
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–
Troubleshooting the Instrument
Check the piping.
Check the power source.
Correct the mounting.
Switch to control mode or switch off the binary
input.
Ensure that
• the actuator is not blocked.
• the supply air pressure is adequately high.
• the specified time limit is higher than 1.5
times the longest stroke time of the
actuator.
If adaption cannot run uninterruptedly for an
actuator, adaption should be switched on until
the alarm does not occur anymore during
controlling actions.
Reset the counter (only possible via a
connected PC with suitable software).
Reset the counter (only possible via a
connected PC with suitable software).