ABB ACH550-VCR - Page 179

ACH550-UH User’s Manual 1-175
Parameters
• The table below shows the ACH550 PFA motor assignments for some typical settings in the Relay Output
parameters (1401…1403 and 1410…1412), where the settings are either =31 (
PFA), or =X (anything but 31), and
where the Autochange function is disabled (8118
AUTOCHNG INTERV = 0.0).
• The table below shows the ACH550 PFA motor assignments for some typical settings in the Relay Output
parameters (1401…1403 and 1410…1412), where the settings are either =31 (
PFA), or =X (anything but 31), and
where the Autochange function is enabled (8118
AUTOCHNG INTERV = value > 0.0).
8118 AUTOCHNG INTERV -0.1…336.0 h 0.1 h 0.0 h (
NOT SEL) 
Controls operation of the Autochange function and sets the
interval between changes.
• The Autochange time interval only applies to the time when
the speed regulated motor is running.
• See parameter 8119
AUTOCHNG LEVEL for an overview of the
Autochange function.
• The drive always coasts to stop when autochange is
performed.
• Autochange enabled requires parameter 8120
INTERLOCKS
= value > 0.
-0.1 =
TEST MODE – Forces the interval to value 36…48 s.
0.0 =
NOT SEL – Disables the Autochange function.
0.1…336 – The operating time interval (the time when the
start signal is on) between automatic motor changes.
WARNING! When enabled, the Autochange function
requires the interlocks (8120
INTERLOCKS = value > 0)
enabled. During autochange the power output is
interrupted and the drive coasts to stop, preventing
damage to the contacts.
Group 81: PFA Control
Code Description Range Resolution Default S
Parameter setting ACH550 Relay assignment
1
4
0
1
1
4
0
2
1
4
0
3
1
4
1
0
1
4
1
1
1
4
1
2
8
1
1
7
Autochange disabled
RO1 RO2 RO3 RO4 RO5 RO6
31 X X X X X 1 Aux. X X X X X
31 31 X X X X 2 Aux. Aux. X X X X
31 31 31 X X X 3 Aux. Aux. Aux. X X X
X 31 31 X X X 2 X Aux. Aux. X X X
X X X 31 X 31 2 X X X Aux. X Aux.
31 31 X X X X 1* Aux. Aux. X X X X
* = One additional relay output for the PFA that is in use. One motor is in “sleep”
when the other is rotating.
Parameter setting ACH550 Relay assignment
1
4
0
1
1
4
0
2
1
4
0
3
1
4
1
0
1
4
1
1
1
4
1
2
8
1
1
7
Autochange enabled
RO1 RO2 RO3 RO4 RO5 RO6
31 31 X X X X 1 PFA PFA X X X X
31 31 31 X X X 2 PFA PFA PFA X X X
X 31 31 X X X 1 X PFA PFA X X X
X X X 31 X 31 1 X X X PFA X PFA
31 31 X X X X 0** PFA PFA X X X X
** = No auxiliary motors, but the autochange function is in use. Working as a
standard PID-control.
PFA with Autochange mode
ACH550
Relay logic