Gardner Denver GD Pilot, Original User Manual

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5. Extended functions
11
5 Exten de d f un cti on s
5.1 [ CONTROL MENU ] sub-menu
The most important parameters of the
[ CONTROL MENU ]
menu have already been explained in section 2 Default
settings. This section simply contains an overview and
explanation of additional (extended) functions.
5.1.1 Operating modes
Go to the
[ CONTROL MENU ]
sub-menu and use the


key to go to the AUTOMATIC OPERATION menu item. If
you press the key, the AUTOMATIC OPERATION
value starts to flash. You can use the


key to now
switch to
CONTINUOUS OPERATION
. Confirm a set
value by pressing the key.
You can choose from two operating modes:
AUTOMATIC OPERATION
AUTOMATIC OPERATION
is the most economical of
your compressor's operating modes. If there is no need
for compressed air in your system, the compressor is
shut down after the
RUN-ON TIME
. The control system
automatically recognises when compressed air is
needed again. The unit then starts up straight away.
CONTINUOUS OPERATION
CONTINUOUS OPERATION
is only needed for some
special applications. When in this operating mode, the
motor is not shut down if there is no longer any need for
pressure. The compressor stage now runs continually
in off-mode when there is no need for pressure.
5.1.2 Second pressure range (
p
2
)
The range between the maximum pressure and the
target pressure is called the pressure range. The
second pressure range function allows you to use
another pressure range in addition to the pressure
range already set (see section 2.2). This could be used
to for example implement night-time lowering.
You will find the settings for the second pressure range
function in the
[ CONTROL MENU ]
sub-menu. The
relevant menu items there are:
p
2
CUT-OUT POINT 10.5bar
p
2
TARGET PRESSURE 10.0bar
p
2
TIMER CONTROL OFF
You can use
p
2
CUT-OUT POINT
and
p
2
TARGET
PRESSURE
to set the line pressure switching points.
Use the p
2
TIMER CONTROL On menu item to activate
the timer for the second pressure range.
You also can activate / deactivate the second pressure
range using an external potential-free contact (see
section 5.5).
Section 5.3.2 contains a description of how to set the
timer for the second pressure range.
Note
The values shown are examples only. The values used
in your unit may be different.
5.1.3 Dryer pre-run
If you are using an external dryer, you can provide the
dryer with a specified pre-run time. The compressor is
then only started after this pre-run time.
To set the pre-run time, please go to the
[ CONTROL MENU ]
sub-menu. From there use the


key to go to the
DRYER PRE-RUN 0min
menu item.
Once you have pressed the key, the
0min
value
starts to flash. You can now use the


or


keys to
set the pre-run time you want. Then confirm your entry
using the
key.
5.1.4 RS 485 communication
You can perform the settings for RS 485
communication in the
[ CONTROL MENU ]
sub-menu.
The
RS485-PROTOCOL ModBus
RS485-BAUDRATE 19200
RS485-ADDRESS 1
menu items are of relevance.
The GD Pilot has a serial RS485 interface. This
interface uses the ModBus RTU protocol.
ModBus interfaces and drivers are available from many
of the well-known manufacturers of programmable logic
controllers (PLC).
You can set the baud rate you want in the RS485-
BAUDRATE
menu item.
You can set the participant number you want in the
RS485-ADDRESS
menu item.
Note
The values shown are examples only. The values used
in your unit may be different.