Future Design MCT-CM, User Manual

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MCT-CM
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* Halt Setpoint Control: When selected, the input will disable set point communications from the MCT
control module to all loop controls attached to the system. This allows for direct,
manual adjustment of the loop set point(s) on the process controllers. The input
acts as a manual override, but still allows the MCT to gather process data for
proper display and data logging purposes.
When activated the loop set point on the MCT will reflect the set point of the loop
control as long as the loop is not under ramp/soak program control. If a change
is made to the set point at the loop control, the new set point will be updated on
the MCT.
If a ramp/soak program is operating, the set point indicated on the MCT will remain
at the value as defined by the running program even though it is not being sent to
the loop controller. If the program is put into hold; however, the set point on the
MCT will match that on the loop control since the loop set point change at the
MCT is allowed when a program is in hold.
Reset Alarm:
When selected, the input will reset any active alarms on the alarm screen. If a
digital output is set to ‘Remote Alarm (NO)’, the output will be turned off. Note
that the input will not clear any alarms from the list on the alarm screen and the
alarm icon will continue flashing.
This is a ‘single-shot’ activation in which the input must make the required
transition state in order to carry out the function. Thus, for each new alarm, the
input must be re-activated to reset the new alarm. Leaving the input in an
activated state will not reset alarms when they occur.
* Defeat Input:
When selected, the input will disable the digital in
puts selected under ‘Defeat’.
The selected inputs will not perform their function until the input defeat is
deactivated.
Halt Defrost: When selected, the input will terminate an active defrost cycle and the fan delay
will begin. If the input is active when a defrost cycle is to begin, the cycle will be
skipped, and defrost will not take place. See section 9.1 Defrost for more
information regarding defrost operation.
NOTE: When redundant system operation is enabled in the configuration, this
input will only operate and terminate defrost when system 1 is the
primary system.
Load Timer:
When selected, the input will active the redundancy product load timer. If the load
timer is already active, the input will reset the timer. See section 9.2 Redundancy
for more information on redundant system operation.
Halt Defrost 2: When selected, the input will terminate an active defrost cycle and the fan delay
will begin on redundant system 2. If the input is active when a defrost cycle is to
begin, the cycle will be skipped, and defrost will not take place. See section 9.1
Defrost for more information regarding defrost operation.
*NOTE: For the input control functions listed with an asterisk (*), the
“on” state for the input is defined
by the transition mode. If
“high” is selected, the input is on when voltage is applied to the input.
If
“low” is selected, the input is on when voltage is removed from the input.