User Manual
EM303B General Purpose Inverter
114
No.
Function
Range
Unit Default Type
F4-10
Integration Function Scale
0.00~100.00
%
100.00
●
F4-10
Integration function scale: When error between PID setting value and feedback is
greater than the setting value, there is no integral operation.
1.
Setting value of F4-10= (PID setting value - Feedback)/PID Scale
2.
Set inverter in the process PID closed-loop control mode, and regulate the parameters
of PID controller based on the output waveforms through the output of feedback signal
monitoring system. Generally, regulation follows the rules:
3.
Increase the proportional gain GP within the range of non-oscillation output.
4.
Shorten integration time constant GTi within the range of non-oscillation output.
5.
Prolong differentiation time constant GTd within the range of non-oscillation output.
After all PID parameters set, all of them can be slightly adjusted by following steps:
Output overshoot suppression: Shorten the differentiation time GTd, and prolong the
integration time GTi, as shown in Figure 7-15.
Output periodic oscillation suppression: Shorten the differentiation time GTd or set it as
zero, and reduce proportion gain GP, as shown in Figure 7-16.
Output
After
Adjustment
Before
Adjustment
Time
Output
Before
Adjustment
After
Adjustment
Time
Figure 7-15
Output overshoot Suppression
Figure7-16
Output periodic oscillation suppression
No.
Function
Range
Unit Default Type
F4-11
PID Upper Limit
0.00~100.00
%
100.00
●
F4-12
PID Lower Limit
0.00~100.00
%
0.00
●
F4-11
limits the range of positive PID output. If PID setting value>PID feedback
continuously, PID operation will not proceed when reached the limit.
F4-12
limits the range of negative PID output. If PID setting value<PID feedback
continuously, PID calculation will not proceed when reached the limit.
No.
Function
Range
Unit Default Type
F4-15
Monitoring
Reference
Options
*
Iq
E-Slip E-Speed *
F
S
F
I
F
O
11111111
●
0
0
0
0
0
0
0
0
0: Absolute Value
，
1: +/-
Bit setting value=0
Monitoring frequency shows absolute value when motor forwards/reverses.
