Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: [phone] FAX: [phone]
www.westlockcontrols.com
1/12/10 TECH-439/D.W.O. 19024 Page 35 of 58
5.2.3. The positioner is properly set-up, and air is applied to the positioner. When
powering up the positioner, the actuator goes into a state of constant
oscillation.
 Check for air leaks and if assembly is tightly coupled: tubing, actuator, bracket,
cables etc.
 The gain settings are probably too high for the actuator/valve assembly. If not
done yet, perform a full automatic calibration (see section 4.7).
 If full auto cal has not given good results, perform a manual auto PID (see
section 4.8, function “PID”).
 If manual PID has not given good results, try to manually fine tune the PID. Enter
the calibration mode and reduce the PCAL value until oscillation ceases.
 Try also to increase the ICAL setting until oscillation ceases.
 Try to adjust PCAL, ICAL and DCAL settings one at a time, until the dynamics
response is satisfactory.
5.2.4. After removing power to the positioner there is full pressure to output port
1 and zero pressure to output port 2.
 On loss of power the positioner fails full air pressure to output port 2. If this does
not happen the positioner is damaged. Contact factory.
5.2.5. An Err 6 (Calibration Error) is returned during a Lo or Hi Calibration.
 In the case of a rotary application, the beacon may be misoriented or the actuator
may not have enough rotation. The positioner requires the actuator to stroke a
minimum of 45 degrees.
 In the case of a linear application, the feedback magnet assembly needs to be
ordered specific to the stroke of the actuator and the fail direction of the actuator.
(See figure 5-1 & 5-2).
5.2.6. An Err 5 (Integrator Overflow) message is shown on the display.
 This message indicates a deviation between position and set-point. This error
message does not clear itself after the problem ceases, therefore, try clearing the
message.
 If the Err 5 returns, make sure all the preliminary checks, as described earlier in
this section, have been made. If still the cause for the Err 5 cannot be diagnosed,
call the factory for help.