ABB ACS 301-2P7-1 - Page 88

74 ACS 300 User’s Manual
Chapter 7 - Drive Parameters
Figure 7-8 PI Controller Gain, I-Time and Error Value.
PI-SCMIN
Minimum scaling factor of the actual value. The setting range is -
999.9 to 999.9 %. The value of PI-SCMIN can be higher than the
value of PI-SCMAX. See the example A in Figure 7-9. In this
example, PI-SCMIN is 400 % and PI-SCMAX is -300 %.
PI-SCMAX Maximum scaling factor of the actual value. The setting range is -
999.9 to 999.9 %. See Figure 7-9 and Figure 7-10. In this
example B, 4 V is equivalent to 0 % and 8 V is equivalent to 100
%. You can get the corresponding values for parameters PI-
SCMIN and PI-SCMAX from the straight line in Figure 7-9. In the
example B, PI-SCMIN is -100 % and PI-SCMAX is 150 %.
Process Error Value
PI Controller Output
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Gain
AAAA
AAAA
AAAA
AAAA
AA
AA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAA
AAA
Gain
PI Integration Time
t