8000m Series
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5.10 F9 Group PID Control Parameters
PID control is a general method that is used for process control. By performing
proportional, integral and differential operations on the difference between the
feedback variable and the target value, it adjusts the output frequency and
constitutes a feedback system to stabilize the controlled variable around the target
value. It is applied to process control such as flow control, pressure control and
temperature control. The principle block diagram of PID control is as follows:
F9.00
PID setting source Factory value 0
Setting range
0 Keypad Preset value(F9.01)
1 Analog terminal AVI
2 Reserved
3 Communication setting
4 Multi-step speed input terminals
When the frequency reference selection is PID, namely F0.03 is selected as 8, this
function is enabled. This parameter determines the given channel of process PID
target value.
The target amount of process PID is a relative value, setting 100% corresponds to
100% of the feedback signal in controlled system; The system will conduct the
calculation based on relative values (0 to 100%).
Note: Multi-step speed input terminals can be achieved by relative settings of FD
parameter group, and the settings are not frequency but the relative values in
percentage of the feedback’s full range.
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