CARLO GAVAZZI PD30CTB BP IO Serie Manuel D'instructions page 13

2.4.1.3. Hysteresis Settings
The hysteresis can be set automatically or manually for SSC1 and manually only for SSC2. The hysteresis is
set in mm for SP1 and SP2.
Note: When trimmer is selected, the default hysteresis is Automatic.
Automatic hysteresis:
Automatic hysteresis will guarantee stable operation for most applications.
Hysteresis is calculated with reference to SP1/SP2 and the actual values can be read via parameter "SSC1
Auto hysteresis", typically 14 mm for PD30CTB.20.., 17 mm for PD30CTBS25... and 24 mm for
PD30CTBR35... for SP1 and SP2.
Manual hysteresis:
When manual hysteresis is selected the hysteresis can be changed between 2 ... 225 mm for PD30CTB.20...,
2 ... 275 mm for PD30CTBS25 and 2 ... 375 mm for PD30CTBR...
For application that require a hysteresis other than the automatic, the hysteresis can be configured manually.
This feature makes the sensor more versatile.
Note: Special attention to the application must be considered when choosing a hysteresis lower than the
automatic hysteresis.
2.4.1.4. Dust alarm 1 and Dust alarm 2
Minimum Excess Gain is used for dust alarm levels and is set as a common value for both SSC1
and SSC2. The dust alarm will be active after a preset time, if the measured Excess Gain value is
below the Minimum Excess gain.
See 2.5.10 Excess Gain.
2.4.1.5. Temperature alarm (TA)
The sensor monitors constantly the internal temperature. Using the temperature alarm setting it is possible to
get an alarm from the sensor if temperature thresholds are exceeded. See §2.5.5.
Two independent temperature alarm settings can be set. One for the maximum temperature alarm and one
for the minimum temperature alarm.
It is possible to read the temperature of the sensor via the acyclic IO-Link parameter data.
NOTE!
The temperature measured by the sensor will always be higher than the ambient temperature, due to internal
heating.
The difference between ambient temperature and internal temperature is influenced by how the sensor is
installed in the application.
2.4.1.6. External input
The output 2 (SO2) can be configured as an external input allowing external signals to be fed into the
sensor, e.g. from a second sensor or from a PLC or directly from machine output.
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2.4.2. Input selector
This function block allows the user to select any of the signals from the "sensor front" to the Channel A or B.
Channels A and B: can select from SSC1, SSC2, Dust alarm 1, Dust alarm 2, Water drop alarm 1, Water drop
alarm 2, Temperature alarm and External input.
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2.4.3. Logic function block
In the logic function block a logic function can be added directly to the selected signals from the input selector
without using a PLC – making decentralised decisions possible.
The logic functions available are: AND, OR, XOR, SR-FF.
Rev.01 - 08.2022 | MAN PD30CTB IO-Link ENG | © 2022 | CARLO GAVAZZI Industri
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