131
AYK550-UH User’s Manual
Start-Up
The table below shows the AYK550 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).v
** = No auxiliary motors, but the autochange function is in use. Working as standard PID-control.
8118
AUTOCHNG INTERV
0.0…336.0 h
0.1 h
0.0
9
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 a stop when autochange is
performed.
• Autochange enabled requires parameter 8120
INTERLOCKS
= value > 0.
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 drive's power output is
interrupted and the drive coasts to stop, preventing
damage to the contacts.
8119
AUTOCHNG LEVEL
0.0…100.0%
0.1%
50.0%
Sets an upper limit, as a percent of output capacity, for the autochange logic. When the output from the PID/PFA
control block exceeds this limit, autochange is prevented. For example, use this parameter to deny autochange
when the Pump-Fan system is operating near maximum capacity.
Autochange Overview
The purpose of the autochange operation is to equalize duty time between multiple motors used in a system. At
each autochange operation:
• A different motor takes a turn connected to the AYK550 output – the speed regulated motor.
• The starting order of the other motors rotates.
The Autochange function requires:
• External switchgear for changing the dive’s output power connections.
• Parameter 8120
INTERLOCKS
= value > 0.
Autochange is performed when:
• The running time since the previous autochange reaches the time set by 8118
AUTOCHNG
INTERV
• The PFA input is below the level set by this parameter, 8119
AUTOCHNG
LEVEL
.
Note!
The AYK550 always coasts to stop when autochange is performed.
Group 81: PFA
Code Description Range
Resolution
Default
S
Parameter Setting
AYK550 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
PFA with Autochange mode
AYK550
Relay Logic
Summary of Contents for AYK 550
Page 256: ...D1 AYK550 UH User s Manual Appendix D Appendix D Base Drive Drawing 205662 Drawings Fig 1...
Page 257: ...AYK550 UH User s Manual D2 Appendix D Base Drive w Fused Disconnect Drawing 205648 Fig 2...
Page 258: ...D3 AYK550 UH User s Manual Appendix D Base Drive w Non Fused Disconnect Drawing 205647 Fig 3...
