Future Design MCT-MC 4.3, User Manual

Page: 74 / 186

MCT-MC
4.3
FDC MCT-MC - 74 - Automatic Program Operation
6.4 Common Questions About Ramp/Soak Program Operation
1. How do I start or run a ramp/soak program?
To select and start a program, use the Program Operation
window which can be accessed from the Loop view
and program Entry screens. All start, stop and hold operations, program edit and select and program settings
are available from this windows.
2. How do I know which program is running?
When a program is running, the name is displayed on program Status view screen as well as the Loop and
Overview screens. It is also shown on the Program Operation window. The MC will indicate that the program
is running when it is in operation. If a program is not running, the MC will display the name of the currently
loaded program, i.e., present in memory and ready to be run.
3 Why is the program not running to the set point entered for the step?
Automatic ramp/soak program operation is limited by the lower and upper set point limits (see section 9.3
Setpoint Limits). If a program step has a set point that exceeds the lower or upper limit, the set point will be
automatically coerced to the limit it exceeds. This prevents damage to equipment or product by insuring that
the system only operates to the range entered by the user. If a program step has a set point of 100 for example,
but the upper limit is 90, when the program is run the set point will be coerced to the maximum allowed upper
limit of 90 during operation of the step.
The original program remains unaltered, so if the user then changes the lower and upper limits to match the
range of set points within the program, the program will then operate to the programmed set points. This insures
that the operating range of the system cannot be exceeded even if a user accidentally copies a program from
another system with a greater operating range.