100 of 166
6.3.2.9 Sensor test
The "Sensor test" function can be used for cyclical testing of the active measurement channels. In the
test, the DIGIFORCE
®
9311 compares the live measurements with stored reference values. The
DIGIFORCE
®
9311 evaluates the result as "sensor test OK/NOK" depending on whether or not the
measured value lies within the defined tolerance; for details please see section 3.8 "Sensor test” on page
19. The "Sensor test" can be launched using the "IN_STEST" control signal or a configurable function
key.
Parameters for channel X and Y in "Sensor test"
Sensor test On / Off Enable / Disable
Measured value <value> or
<value input>
Reference value measured for the sensor test.
This value is used as the comparison value
when running the sensor test. If the value
measured during the sensor test lies within the
permitted tolerance, the control signal
"OUT_OK_STEST" is set to 1 (sensor test
OK).
If the value lies outside the permitted
tolerance, then "OUT_OK_STEST" = 0
(sensor test NOK).
Max allowed deviation [+/-] <value input>
Set here the permitted +/- tolerance for the
OK/NOK decision of the sensor test.
Running the sensor test
You can initiate the sensor test via the PLC I/O control interface or the Fieldbus interface using the
"IN_STEST" signal (please see section 10.7 “External actuation of a sensor test” on page 157).
Note: Do not run the cyclical "tare" function and "sensor test" at the same reference value e.g. at the
reference position on a machine. If you were to do this, the tare action would prevent reliable
identification of any potential sensor fault or sensor drift.
To Next Page
Loading...
Need help?
General