3.19 Main Menu - Pack Controller - Group
25
3.19.1 25-** Pack Controller
Parameters for configuring the Basic Pack Controller for
sequence control of multiple compressors. For a more
application oriented description and wiring examples, see
section
Application Examples, Basic Pack Controller
.
To configure the Pack Controller to the actual system and
the desired control strategy, it is recommended to follow
the below sequence, starting with
System Settings
,
parameter group 25-0*, and next
Alternation Settings
,
parameter group 25-5*. These parameters can normally be
set in advance.
Parameters in
Zone Settings
, 25-2*,
Staging Functions
, 25-3*
and
Staging settings
, 25-4*, will often be dependent on the
dynamic of the system and final adjustment to be done at
the commissioning of the plant.
In most cases, only 25-0* and 25-2* will need adjustment.
NOTE
The Pack Controller is supposed to operate in closed loop
controlled by the built-in PI controller (
[3] Process Closed
Loop
selected in
). If
[0] Speed Open
Loop
is selected in
, all fixed speed
compressors will be destaged, but the variable speed
compressor will still be controlled by the frequency
converter, now as an open loop configuration:
Illustration 3.62
Parameter Description
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®
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