Chapter 6 – Parameters
ACH 500 Programming Manual 6-47
1 PI-CONT GAIN
This parameter defines the gain of the PI-Controller included in the
Application macros of the ACH 500. Setting range is 3 – 800%. If you select
100%, a 10% change in error value causes controller output to change by 1.5
Hz.
If the parameter value is set to 3.0%, the PI-Controller operates as an
I-Controller.
Table 6-24 lists a few examples of gain settings, and the resulting output
frequency change to a 10% change in error and a 50% change in error.
Table 6-24 Gain Settings
2 PI-CONT I-TIME
If the parameter value is set to 320.00s, the PI-Controller operates as a
P-Controller. Time range is 0.02s – 320.00s, 0.01s step.
Figure 6-20 shows PI-Controller Gain, I-Time, and Error Value.
Figure 6-20
PI-Controller Gain, I-Time, and Error Value
3 REFERENCE STEP 1
0 – 100%
Value that the setpoint (reference) is increased when the first lag motor is
started.
PI-Cont Gain
Output Frequency
Change for a 10%
Change in Error
Output Frequency Change
for a 50% Change in Error
50% 0.75 Hz 3.75 Hz
100% 1.5 Hz 7.5 Hz
300% 4.5 Hz 22.5 Hz
Error Value
PI-Controller
Gain
Gain
PI-CONT I-TIME
t
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