Honeywell UDC3200 Product Manual page 64

Configuration
Function Prompt
Lower Display
CONT ALG
(continued)
TIMER
PERIOD
52
Selections or
Range of Setting
Upper Display
3PSTEP
DISABLE
ENABLE
0:00 to 99:59
UDC3200 Universal Digital Controller Product Manual
Parameter
Definition
THREE POSITION STEP—The Three Position Step
Control algorithm allows the control of a valve (or
other actuator) with an electric motor driven by two
controller relay outputs; one to move the motor
upscale, the other downscale without a feedback
slidewire linked to the motor shaft. The deadband is
adjustable in the same manner as the duplex output
algorithm.
The Three Position Step Control algorithm provides
an output display (OUT) which is an estimated motor
position, since the motor is not using any slidewire
feedback. Although this output indication is only an
approximation, it is "corrected" each time the
controller drives the motor to one of its stops (0 % or
100 %). It avoids all the control problems associated
with the feedback slidewire (wear, dirt, noise). When
operating in this algorithm, the estimated OUT
display is shown to the nearest percent (i.e., no
decimal). This selection forces the Output Algorithm
selection to "POSITON". See Subsection 3.8.
Refer to the Operation section for motor position
displays.
As a customer configurable option, when a second
input board is installed, the motor slidewire can be
connected to the controller. The actual slidewire
position is then shown on the lower display as POS.
This value is used for display only. It is NOT
used in the Three Position Step algorithm. To
configure this option, set Input 2 actuation to
SLIDEW and then calibrate Input 2 per Subsection
6.4.
ATTENTION Other prompts affected: DEADBAND
TIMER allows you to enable or disable the timer
option.
The timer option allows you to configure a timeout
period and to select timer start by either the
keyboard (RUN/HOLD key) or Alarm 2. A digital
input can also be configured to start the timer.
When the timer is enabled, it has exclusive control of
the alarm 1 relay; any previous alarm configuration is
ignored. At timeout, the timer is ready to be re-
activated by whatever action has been configured.
Alarm 1 is activated at the end of the timeout period.
PERIOD allows you to configure the length of
timeout period (from 0 to 99 hours: 59 minutes).
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