Future Design MCTB 4.3, User Manual

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MCTB
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If power is lost to the system while a program is in TOD start, and then returns after the
scheduled date/time at which the program was to start, the program will begin operation from
the moment power is restored.
6.2.2 Hold/Resume Ramp/Soak Program Operation
At any time during the operation of a program, it can be manually placed into hold. This stops the program
timer; however, the MCTB continues operation under the current step settings at the time the program was put
into hold. To pause a program, select
“Hold” from the Program menu. To resume the program from the point
in which it was paused, select
“Start” from the Program menu.
NOTE: The program will automatically be placed in hold if holdback is enabled for the step and the process
value of the selected loop deviates from set point by more than the holdback band. When the program
is in holdback, it cannot be resumed by pressing the Run button. The program will automatically resume
once the process value of the selected “hold loop(s)” is within the holdback band from set point.
6.3 Monitoring Automated Ramp/Soak Program Operation
The program Status view provides all information regarding the operation of the current program.
The
Status field indicates the current operating mode of the program, i.e., On, In Hold and Off.
The
Cycles field indicates the number of cycles left to be completed for the current jump loop.
The
Steps field indicates the total number of steps in the current program.
The
Step field indicates the step number currently being executed.
The
Time field indicates the total length of time programmed for the current step in hours, minutes and seconds.
Time Remaining is the time remaining in the current step.
The set points for each loop are shown dynamically based on the number of loops programmed for automatic
ramp/soak operation. They indicate the programmed set point that will be achieved by the end of the step. The
fields will also indicate the current ramp or soak status for the loop based on the set point of the step. If the
target set point of t
he step is greater than the loop set point, “ramp up to” will be displayed. If the set point is
lower than the current loop set point, “ramping down to” will be displayed. If the step is a soak step or the target
set point is the same as the current loop
set point, “soak at” will be displayed.