ABB UNITROL 1020 - Analog Outputs

 Chapter 3 - Device Overview
UNITROL 1020 User Manual 3BHS335648 E82 31
3.3.8 Analog Outputs
Output Function
Description
None
Output not assigned
Excitation Current
Excitation current
PWM
Pulse width modulation, control value is scaled from 0 to 100%. It
represents the actual field voltage output of 0.5 to 99%
Ue Field Voltage
Excitation voltage (absolute)
Upwr DC Link
Voltage
Received excitation input power voltage
Um relative
Machine terminal voltage
Active Power
Machine active power (relative)
VAR relative
Machine VAR relative
PF absolute
Machine PF absolute, negative: -Q / positive for +Q
Fbias
Analog continuous signal presenting difference between U
NET
and U
M
Fbias = f
NET
– f
NOM
– (Slip
MAX
– Slip
MIN
)/2- Slip
MIN
Output signal Fbias is forced to zero:
- Not in Sync mode
- Synchronization function not enabled (unit without Sync-Option)
- Network frequency is not between 45 to 66 Hz
Slip
Slip between Network and Machine frequencies
PSS TP output 1
PSS test point 1, select signal over PSS test interface in CMT1000
PSS TP output 2
PSS test point 2, select signal over PSS test interface in CMT1000
Note: The assignment of the analog outputs to the 2 terminals AO1 and AO2 can be
selected freely.
3.3.8.1 Level of the Analog Outputs
A minimum and maximum voltage level can be set for every analog output. This level
represents a defined scaling, which is shown in the table below.
Output Function
Uout0%
Min (-10… +10 V)
Uout100%
Max (-10…10 V)
Remarks
Excitation Current
Ie Range min
Ie Range max
Scaling: 0% … 400%
PWM
0% (fix)
100% fix
Ue Field Voltage
0V (fix)
Ue Field Voltage
max
Range: 0 to 500 V
Upwr DC Link
Voltage
0V (fix)
Upwr DC Link
Voltage max
Range: 0 to 500 V
Um relative
0V (fix)
Um relative max
Range: 0% … 400%
Active Power
Active Power min
Active Power max
Range: -200% … +200%
VAR relative
Negative VAR max
VAR max
Range: 0% … 200%
PF absolute
Min PF setpoint
Max PF setpoint
Scaling according to min/max
PF setpoint
Fbias
Fbis min
Fbias max
Range: -10 to +10 Hz
Slip
Negative Slip max
Slip max
Range: 0 to 10 Hz
PSS TP output 1
Neg. peak value
Pos.peak value
Scaling depending on PSS test
interface settings
PSS TP output 2
Neg. peak value
Pos.peak value
Scaling depending on PSS test
interface settings