Zener MSC-3, Instruction Manual

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IM00120 113 IM00120
MSC-3 Instruction Manual
H00 PID Control
This menu is the entry point for the PID controller menus where adjustments can be made. Parameters
that may be viewed or adjusted are: the Proportion Band, the integrator gain, the differential gain, the
output clamp limit values, the process and set point variable choices and PID scale and units for the PID
display.
H01 PB (%)
H01 PB (%)
> 300.0%
Range: -1000.0...1000.0 %
• Press  to edit the value.
• Press
▲
/
▼
to make changes to the value.
• Press  to accept the new value OR
• Press ESC to abandon the value change.
The H01 PB (%) value is the proportion of input required to generate 100% at the output of the PID
control (assuming no integrator (I) or differentiator (D) components). For example H01 PB (%) is 300.0%,
the gain is 100/300 = 0.333. That is 3 units of input will generate 1 unit of output
H02 Ti (sec/r)
H02 Ti (sec/r)
> 2.0 sec/r
Range: 0.0...40.0 sec/r
• Press  to edit the value.
• Press
▲
/
▼
to make changes to the value.
• Press

to accept the new value OR
• Press ESC to abandon the value change.
The H02 Ti (sec/r) value is the time needed by the integrator (I) to “repeat” the value at its input. For
example the error signal is 10 units (units not specified); H02 Ti (sec/r) is set to 2.0 sec/r; the present
value of the integrator is 0; after 2 seconds the present value of the integrator is 10 units.
A low H02 Ti (sec/r) value attempts to regulate the process variable quickly. However if excessively low,
over shooting and under shooting will be more prominent.
A high H02 Ti (sec/r) value diminishes over shooting and under shooting. However regulation takes
longer to achieve.