GE Ecomagination AF-600 FP Programming Manual page 181

Parameter Description
PC-50 Lead Pump Alternation
Option:
[0] Off
*
3 3
[1] At staging
[2] At
command
[3] At staging
or
command
PC-51 Alternation Event
Option:
[0] External
*
[1] Alternation
Time
Interval
[2] Sleep Mode Alternation takes place each time the lead
[3] Predefined
Time
PC-52 Alternation Time Interval
Range:
24 [1 -
h 999 h]
*
180
Function:
No alternation of lead pump function takes
place. It is not possible to set this parameter to
options other than [0] Off if
parameter PC-02 Motor Start is set other than
[0] Direct on Line.
Alternation of the lead pump function takes
place when staging another pump.
Alternation of the lead pump function takes
place at an external command signal or a pre-
programmed event. See
parameter PC-51 Alternation Event for available
options.
Alternation of the variable speed (lead) pump
takes place at staging or the At command-
signal (see above).
Function:
This parameter is only active if the options [2]
At Command or [3] At Staging or Command
have been selected in parameter PC-50 Lead
Pump Alternation. If an alternation event is
selected, the alternation of lead pump takes
place every time the event occurs.
Alternation takes place when a signal is
applied to 1 of the digital inputs on the
terminal strip and this input has been assigned
to [121] Lead Pump Alternation in Digital Inputs.
Alternation takes place every time
parameter PC-52 Alternation Time Interval
expires.
pump goes into sleep mode. Set
parameter CL-23 Setpoint 3 to [1] Sleep Mode or
apply an external signal must be applied for
this function.
Alternation takes place at a defined time of the
day. If parameter PC-54 Alternation Predefined
Time is set, the alternation is carried out every
day at the specified time. Default time is
midnight (00:00 or 12:00AM depending on the
time format).
Function:
If selecting [1] Alternation Time Interval in
parameter PC-51 Alternation Event, the alternation
of the variable speed pump takes place every
time the alternation time interval expires (can be
checked in parameter PC-53 Alternation Timer
Value).
PC-53 Alternation Timer Value
Range:
0 [0 - 7] Read-out parameter for the alternation time interval
*
PC-54 Alternation Predefined Time
Range:
0 [0 -
*
0]
PC-55 Alternate if Load < 50%
Option:
[0] Disabled The lead pump alternation takes place at any
[1] Enabled The lead pump function is alternated only if the
*
PC-56 Staging Mode at Alternation
Option:
[0] Slow
*
[1] Quick At alternation, the variable speed pump is accceled
03/2016 All rights reserved.
Function:
value set in parameter PC-52 Alternation Time
Interval.
Function:
If selecting [3] Predefined Time in
parameter PC-51 Alternation Event, the variable speed
pump alternation is carried out every day at the
specified time set in alternation predefined time.
Default time is midnight (00:00 or 12:00AM
depending on the time format).
Function:
NOTICE
Only valid if parameter PC-50 Lead Pump
Alternation is different from [0] Off.
If selecting [1] Enabled, the pump alternation can
only occur if the capacity is equal to or below
50%. The capacity calculation is the ratio of
running pumps (including the variable speed
pump) to the total number of available pumps
(including variable speed pump, but not those
that are interlocked).
N
RUNNING
Capacity = × 100 %
N
TOTAL
For the basic Pump Controller all pumps are
equal size.
pump capacity.
number of pumps running are providing less
than 50% of total pump capacity.
Function:
This parameter is only active if the option selected
in parameter PC-50 Lead Pump Alternation is different
from [0] Off.
2 types of staging and destaging of pumps are
possible. Slow transfer makes staging and destaging
smooth. Quick transfer makes staging and destaging
as fast as possible; the variable speed pump is just
cut out (coasted).
At alternation, the variable speed pump is accceled
to maximum speed and then deceled to a stand still.
to maximum speed and then coasted to stand still.
DET-620D