7. Compressor module (VSD)
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7.6 Parameters
To control a speed regulated compressor using a
compressor module (VSD), the following parameter
settings must be made.
These parameters can be set from the menu on the
corresponding compressor.
Address
The address set here must be the same as that set at
the compressor module (VSD).
Control
This must be set to "Compress. module (VSD)".
FAD max. and min.
Maximum and minimum free air delivery of the
compressor.
Hours
Since the operating hours can not be read from the
compressor control, they must be entered manually
(total hours and loaded hours).
Connection
Invert signals
This parameter specifies whether voltage at the
corresponding inputs indicates a signal or not.
Type line pressure sensor
This shows whether the type of line pressure sensor is
4..20mA or 0..5V or 0..10V.
Feedback control circuit
Danger
Do not set too high a value for the "Safety
pressure" parameter. This value must be the
maximum pressure of the corresponding
compressor.
Safety pressure
If the line pressure that is measured from the line
pressure sensor of the compressor exceeds this value,
the load of the compressor will be interrupted and it will
be switched over to internal regulation of the
compressor, so that the speed will be automatically
reduced.
Off-load pressure
The line pressure value at which the compressor is
switched to off load.
This value is necessary in order to have a defined set
point for switching the compressor to off-load.
Target pressure
The line pressure value which is the target pressure of
the compressor control.
The GD Connect 12 regulates the compressor speed to
the off-load pressure and target pressure.
Load pressure
The line pressure value at which the compressor is
switched from standby to load to produce compressed
air.
This value is necessary in order to have a defined set
point for switching the compressor to load when it is on
standby.
Max. and off load speed
Indicates the maximum and minimum speed, i.e. the
regulation range of the compressor.
Number of pole pairs
Indicates the number of pole pairs of the compressor
motor to detect correctly the speed.
