INFICON T-Guard Leak Detection Sensor - Manual (Page 37)

Installation
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4.6.3 Selection of functions assigned to the PLC outputs.
Main menu
→
Settings
→
Interfaces
→
Define PLC outputs
In the sub-menu D EFINE PLC OUTPUTS , you can set which pin
of the I/O connector (suitable for PLC outputs) shall be assigned to which command.
Signal Explanation
OPEN low-resistance, for testing purposes
CLOSE: high-resistance, for testing purposes
TRIGGER 1 low-resistance means Trigger 1 was exceeded
TRIGGER 2 low-resistance means Trigger 2 was exceeded
READY low-resistance means the T-Guard™ is ready for the next
measurement. In Continuous Measurement mode, the T-
Guard measures the reference line.
CYCLE ACTIVE low-resistance means the T-Guard™ Leak Detection Sensor is
just performing a measurement cycle This includes automatic
purging and reference measurement in Carrier Gas mode.
There is no measuring cycle in Continuous Measurement
mode. That is the reason why the output is always high-resis-
tive.
STANDBY low-resistance means that the T-Guard™ Leak Detection
Sensor is just in Standby mode
ERROR low-resistance means an error has occurred
WARNING low resistance means there is an outstanding warning
ERROR / WARN low-resistance means an error has occurred or there is an
outstanding warning
CAL ACTIVE low-resistance means a calibration is running right now
REC. STROBE low-resistance means the recorder output is invalid for 300 ms
because of changing the decade of LR Mantissa and LR
Exponent.
MEASURE low-resistance means that the T-Guard™ Leak Detection
Sensor is just measuring. The leak rate of the last measure-
ment is on when this output and also the REC STROBE output
are high-resistive.
GROSS / FINE low-resistance means that the T-Guard™ Leak Detection
Sensor is just in GROSS mode
GROSSLEAK low-resistance means the highest trigger value was exceeded
by at least the factor 5.
CONTAMINATED low-resistance means the sensor was contaminated with too
much helium. In this case, immediately purge the reference
line with external air or nitrogen to decontaminate the sensor.
INV TRIGGER 1 high-resistance means Trigger1 was exceeded
INV TRIGGER 2 high resistance means Trigger2 was exceeded
INV READY high-resistance means the T-Guard™ is ready for the next
measurement. In Continuous Measurement mode, the T-
Guard measures the reference line.