Dc References - ABB ACS 600 User Manual

Chapter 6 – Firmware Description

DC References

Reference Selection
DC VOLT REF
23.01
Reference List
6-12
The ISU control has two reference values for the DC voltage control:
• Parameter 23.01 DC VOLT REF (user given reference)
• Parameter 2.05 DC REF Q-CTRL.
DC reference chain is initialized during synchronization. The value of
Par. 2.07 DC REF INITIALIZ is copied to parameters 2.05 DC REF Q-
CTRL and 2.06 DC REF RAMP.
A block diagram of reference selection (Parameter 23.01 DC VOLT
REF / Parameter 2.05 DC REF Q-CTRL) after synchronization is
shown below.
DC REF Q-CTRL
2.05
RAMPING
120.01 DC RAMP UP
120.02 DC RAMP DOWN
In normal mode the ramped value of Parameter 23.01 DC VOLT REF
is selected, if it is higher than Parameter 2.05 DC REF Q-CTRL. The
DC reference ramping times are set by Parameters 120.01 DC UP
TIME and 120.02 DC DOWN TIME. Minimum and maximum values for
the DC reference are set by Parameters 113.01 DC REF MAX and
113.02 DC REF MIN.
The references are listed below.
Code Parameter
23.01 DC VOLT REF
113.01 DC REF MAX
113.02 DC REF MIN
120.01 DC RAMP UP
120.02 DC RAMP DOWN
Actual Value
2.05 113.05 DC REF Q-CTRL
2.07 150.02 DC REF INITIALIZ
2.06 122.02 DC REF RAMP
SELECTOR
LIMITER
A
MAX(A,B)
B
113.01 DC REF MAX
113.02 DC REF MIN
Description
User given reference
Upper limit for the reference
Lower limit for the reference
Ramp up time
Ramp down time
Reference from cosfii control
Initialized reference
Ramped and limited reference
ACA 635 IGBT Supply Sections
DC REF RAMP
2.06