10 Configuring the control’s inputs and outputs
60 PHLOX II Ignition Control System
10 Configuring the control’s inputs and outputs
10.1 Digital inputs
Configuring of digital inputs is described in detail in chapter
8 Switching functions.
10.2 Analogue inputs
10.2.1 Calibration of current/voltage inputs
Sensors convert physical quantities (e.g. pressure) to electric quantities (voltage, cur-
rent). The PHLOX II control unit measures voltage/current and indicates them directly
in V or mA. To enable the control to operate with the physical value transmitted by the
sensor, it is necessary that the control be provided with two reference values informing
it about the relation between the electrically measured values and the actual physical
quantities. The two reference values are the sensor output values associated with the
minimum and maximum measuring values as described in
7.4 Measuring ranges of
sensors. With this information, the control is capable of normalising the measured val-
ues and of displaying them specified in percent age terms of the sensor range or directly
in terms of their physical values.
The PHLOX II voltage/current input is associated with a low reference value (parameter
1510 AnalogIn1_RefLow) and a high reference value (parameters 1511 Analog-
In1_RefHigh). If the sensor signal is inverted the low reference value absolutely may be
higher than the high reference value.
Parameterising example:
A manifold pressure sensor has been connected to the analogue input. Its measur-
ing range should be from 0.5 bar to 3.5 bar and is to be converted into a voltage
ranging from 0.5 V to 4.5 V. The parameter 3510 AnalogIn1 displays the voltage
as measured and the parameter 2912 ManifoldPressure will read the converted
measuring value by bar.
Number Parameter Value Unit
912 AssignIn_MnfldPress 1
974 MnfldPressSensorLow 0.5 bar
975 MnfldPressSensorHigh 3.5 bar
1510 AnalogIn1_RefLow 0.5 V
1511 AnalogIn1_RefHigh 4.5 V
4912 ChanType_MnfldPress 0
5512 AIVoltOrCurrent 1
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