INFICON T-Guard Leak Detection Sensor - Manual (Page 34)

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4.6 Connecting a PLC
4.6.1 Selection of functions assigned to the PLC inputs.
Select the PLC inputs as follows:
Main Menu
→
Settings
→
Interfaces
→
Select PLC Inputs.
In the sub-menu S ELECT PLC INPUTS , you can set which pin
of the I/O-connector (suitable for PLC-inputs) shall be assigned to which command.
Please find a complete list of the input commands and their meanings below:
To change the commands assigned to the input-pins, select the appropriate pin using
the UP and DOWN arrows on the left side of the display.
Then select the desired command from the list of commands using the UP and
Command Explanation
START Starts a measuring cycle.
If the T-Guard™ Leak Detection Sensor was in STANDBY the
start will be delayed by some seconds.
STOP Stops a measurement cycle. You will not get a valid leak rate.
START/STOP Starts and stops a measurement cycle if switched to HIGH or
LOW , respectively.
CAL Starts a calibration.
A successful calibration changes the calibration factor.
PROOF Starts checking the calibration with the proof leak rate.
CLEAR Clears errors and warnings. T-Guard™ Leak Detection
Sensor restarts in case of an error.
READY Wakes up the T-Guard™ Leak Detection Sensor from
Standby mode.
STANDBY Puts the T-Guard™ Leak Detection Sensor on Standby
mode. This enlarges the sensor lifetime.
GROSS / FINE Switches between GROSS and FINE measurement.
Only available in Continuous Mode.
PURGE Purges the measurement line as long as input is high. The
helium sensor signal will be ignored.
Only available if auto-purge is off.
INV START electrically inverted START command
INV STOP electrically inverted STOP command
STOP/START Stops and starts a measurement cycle, if switched to HIGH
and LOW, respectively.
INV CAL electrically inverted CAL command
INV PROOF electrically inverted PROOF command
INV CLEAR electrically inverted CLEAR command
INV READY electrically inverted READY command
INV STANDBY electrically inverted STANDBY command
FINE / GROSS Switches between FINE and GROSS. Only available in Conti-
nuous Mode.
INV PURGE electrically inverted PURGE command