F7: Pid Parameters - Senlan SB200 Series User Manual

F6-42 PFO Duty Ratio Corresponding with 100%
F6-43 PFO Duty Ratio Corresponding with 0％
Setting
0.0～100.0％
Range
PFO: The internal percentage signals are outputted as pulse frequency or duty ratio. Refer to the
following figures:
PFO frequency
(Hz)
F6-40
F6-41
0
In frequency modulation, the duty ratio is fixed at 50%; in duty ratio modulation, the pulse
frequency is fixed at F6-40.

6.8 F7: PID Parameters

F7-00 PID Control Function Options
0: PID control is not selected
1: PID control is selected (PID output takes the max. frequency as 100％)
Setting
2: PID is selected for frequency settings modification (PID output takes the max.
Range
frequency as 100％)
3: PID control is selected for frequency settings of constant pressure water supply
PID may be used to control such process variables as tension, pressure, flow rate, liquid level and
temperature. To decrease deviation by proportional changing control function with deviation that
are reacted by proportional elements; the integral element is used primarily to eliminate
steady-state errors. The longer the integral time, the weaker the integral effect; the shorter the
integral time, the stronger the integral effect. The differential element predicts the change of
deviational signals by analyzing the trend of deviational changes. It also inhibits the control
signals prior to deviational increase so as to improve the response speed of the control.
If the PID control is selected for constant pressure water supply (F7-00=3) but the water supply
function (F8-00) is not selected, the parameter settings will be ineffective (F7-00=0).
Refer to the following figure for PID structure:
Details about Function Parameters
Factory
Setting
s
Factory
Setting
s
PFO duty ratio (%)
F6-42
F6-43
100%
Factory
Setting
s
100.0% Modification
0.0% Modification
0
0 Modification
○
○
100%
×
105