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MCT-CM
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NOTE: The analog outputs
always treat the ‘Out Min’ field as the 0Vdc or 4mA output value and the ‘Out Max’
field as the 10Vdc or 20mA output value. This allows any portion of a control loop’s output range to be
retransmitted and represented as a range of 0% to 100% of output or 100% to 0% of output.
10.7 Digital Inputs
The MCT provides eight digital inputs standard, and is configurable up to 16. The inputs can be used as alarm
inputs, used to start and stop a ramp/soak program, start and stop data logging or even disable set point
communications to the MCT loop controls. The digital inputs can be configured to work on either a low to high
transition or a high to low transition. Upon seeing the selected transition, the input will perform the action
selected from the input function list.
The left and right navigation buttons at the upper right of the screen allow the user to scroll through each
available input. To make changes to the input’s configuration, select the desired transition mode and function
for the input. Once all selections have been made, press the ‘Save’ button to save the changes. If you do not
press the ‘Save’ button, all changes will be lost if you leave the screen or navigate to another digital input.
NOTE: More than one digital input can be configured for the same function. If more than one is set for the
same function, make sure that they do not interfere with each other or the selected function they are to
perform may not operate as expected.
The
Delay is used to delay the input function for a period of time (in seconds) once the input transition state is
detected (and maintained). It can be used to ‘debounce’ an input or act as an alarm delay to prevent false
alarms. The time is configurable from 0.0 to 3276.0 seconds.
The
Transition select buttons set the input state that makes the input perform the required function.
High: This setting sets the input up to perform the desired function when the input goes from an off state
to an on state. This requires the application of 24Vdc power to the input.
Low: This setting sets the input up to perform the desired function when the input goes from an on state
to an off state. That requires the removal of 24Vdc power from the input.
The digital input
Function defines what event is to happen when the input meets the transition state.
The Input Function list is shown when the function selection button is pressed. The input functions selections
are mutually exclusive, i.e., only one can be made at a time. An input can also be disabled by turning off all of
the input functions. Once the desired selection has been made, press the Return Button to return to the Digital
Input screen.