ABB ACH 501 - Page 61

Chapter 6 – Parameters
ACH 500 Programming Manual 6-15
V/DC BUS
DC bus voltage. 20 mA = 100% of Nominal DC Bus Voltage (V
N
x 1.35).
MOTOR VOLT
Motor voltage. 20 mA = Supply Voltage.
REFERENCE
Active reference that the ACH 500 is currently following. 20 mA = 100% of
the active reference.
The following can only be seen when the Pump & Fan macro is selected.
ERROR VAL
Scaled difference of ACT and REF values.
PICON OUTP
PI regulator output.
ACTUAL 1
Unscaled actual value 1.
ACTUAL 2
Unscaled actual value 2.
PICON REF
Reference of PI-Controller.
2 SCALE AO1 This parameter is the scaling factor for the Analog Output 1 signal. If you
select 100%, the nominal value of the output signal corresponds to 20 mA. If
the maximum is less than full scale, increase the value of this parameter.
3 MINIMUM AO1 The minimum value of the Analog Output signal can be set to either 0 mA or
4 mA.
4 RC FILTER ON AO1 Filter time constant for Analog Output 1.
As Analog Output value changes, 63 percent of the change takes place within
the time period given by this parameter. If you select the minimum value
0.01s, the signal is not filtered. (See Figure 6-3 for Parameter 10.7.4).
5 INVERT AO1 If you select YES, the Analog Output 1 signal is inverted.
6 ANALOG OUTPUT 2 Refer to Parameter 10.7.1.
7 SCALE AO2 Refer to Parameter 10.7.2.
8 MINIMUM AO2 Refer to Parameter 10.7.3.
9 RC FILTER ON AO2 Refer to Parameter 10.7.4.
10 INVERT AO2 Refer to Parameter 10.7.5.