Page
14
of
18
DPS POSITIONER SOFT RESET
REPORTED FAULT
POSSIBLE REASON(S) POSSIBLE SOLUTIONS/ ADVICE
DPS not responding
accurately to input
signals
Lost calibration,
software locked up/
looping in micro-chip
•
Remove power
•
Remove control signal Din plug (centre plug)
•
On the control Din plug base, create a short circuit between pin 3 (at 6 ’ clock position) and pin 1 (at 3 o’ clock position).
•
Apply power. LED blinks then goes solid. After 5 seconds, remove short
•
Soft reset complete – reconnect all Din plugs and re-test.
•
If not successful, perform hard reset (remove DPS completely, operate actuator as on-off, then re-install DPS)
DPS POSITIONER FAULT FINDING
REPORTED FAULT
POSSIBLE REASON(S) POSSIBLE SOLUTIONS/ ADVICE
Poor or no
performance from
positioner
Control signal is most
often the main culprit.
There are many
contributory factors.
NOTE
:
Most operational issues with modulating actuators relate somehow to signal problems. If a soft reset doesn’t correct the issue, start
by removing the user’s signal (remove the centre Din plug) and applying a signal from a hand held device, totally independent from the
customer’s system, to see if the issue disappears – often it doe, proving that it is a site control signal issue. Alternatively, if this is not
possible or practical, if there are other similar actuators on the same system that are working, remove the ‘faulty’ actuator and connect it
to the cables from another actuator that is known to work, to see if the ‘fault’ disappears, or transfers.
In no particular order:
•
The internal control signal plug has been located in the wrong socket (ie: 4-20mA control, plugged into 0-10V on DPS PCB)
EMI (Electro-magnetic interference) causes interference/ ‘noise’ in the control signal being received by the DPS, resulting in poor
performance. All control devices operate more accurately and reliably with a ‘clean’ signal.
