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15 Base Load Sequencing (BLS) (Optional)
Gardner Denver
56
15.5 Supported Slave Compressor
Controllers and Required Software
Versions
Note
The slave controller’s RS485:1 interface must not be
used by any other system e.g. for remote monitoring
etc.
The following compressor controllers are supported and
must have a software version number not less than one
of those stated below:
Required Software Versions
Electronic Controller
Minimum Required
Software Versions
GD Pilot TS -
EnviroAire
DXL-DH-1.00
GD Pilot TS -
EnviroAire VS
DXL-DHRS-1.00
GD Pilot TS -ESM
DXL-L-1.02
GD Pilot TS -VS
DXL-LRS-1.04
GD Pilot-
DPro-L-1.18
GD Pilot-VS
DPro-LRS-1.02
GD Pilot-MK
SD31V2.05
GD Pilot MK -VS
D31RS1.06
The software version can be checked in the controller
menu structure. For more information refer to the
individual user manuals delivered with your
compressor.
Please contact your local Gardner Denver Technical
Support if a software update is required.
15.6 The
Base Load Sequencing (BLS)
Page
To activate the Base Load Sequencing feature, enter
code
1234
once on the
Access Code
Page. The “BLS”
tab then becomes visible and can be accessed.
Note
If code 1234 is entered for a second time, the
“
Base
Load Sequencing
”
tab will be deactivated again.
The Base Load Sequencing feature can be activated
even if the RS485:3 module is not installed. In this
case, you will get a communication fault message
because the master cannot establish communication
with the slaves, as they are not connected. See chapter
15.13.
If you select the
Base Load Sequencing (BLS)
page before any slave compressors have been defined,
or with the BLS feature switched off, an appropriate
message box will appear.
15.6.1
“Base Load Sequencing” Tab
The symbols which appear beside the BLS symbol
may vary, depending on the operating status of the
machine. They give the following information:
BLS is switched off. The page is only
being displayed and all compressors are
running independently using their own
individual settings.
BLS is switched on.
BLS is switched on and timer-controlled.
The BLS page displays an alarm.
Typical BLS display.
Fig. 58 Example of a BLS
The example above shows a BLS group consisting of
the master (compressor 1) and three slaves numbered
as 2, 3 and 4.
Note
Only configured slave compressors are shown. This
means that at the first activation (number of slaves = 0),
only the master compressor is shown. The compressor
naming, e.g. "Compressor 1" can be modified freely as
described later.
1.
Current compressed air output of
the BLS group.
2.
Current line pressure
3.
p1 Cut-In Point/p2 Cut-In Point
p1 Cut-Out Point/p2 Cut-Out
Point
If the BLS is turned on, this indication displays the
current minimum and maximum line pressure, at which
the next available compressor is activated (p1 cut-in
point/p2 cut-in point) or shut down (p1 cut-out point/p2
cut-out point).
Note
With
machines, the target pressure of the BLS group
is exactly between the two values.
Symbols p1 or p2 and the optional clock symbol
indicate the pressure band in use and whether timer
control is in operation (for more information see chapter
6.1
and chapter 11).
VS