Vega VEGAPULS 6X - Parameter Adaptations after the First Setup

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8 Functional safety (SIL)
VEGAPULS 6X • Two-wire 4 … 20 mA/HART
66190-EN-221107
2. Observe holding time of 1 minute, compare measured value with
the calculated current value
3. Raise the level to directly below the switching point
4. Observe holding time of 1 minute, compare measured value with
the calculated current value
Range monitoring:
1. Move to level immediately above the upper range limit
2. Observe holding time of 1 minute, compare measured value with
the calculated current value
3. Move to three levels within the range limits (upper, middle, lower
value)
4. Observe holding time respectively of 1 minute, compare meas-
ured values with the calculated current values
5. Move to level immediately below the lower range limit
6. Observe holding time of 1 minute, compare measured value with
the calculated current value
Result:
The measured output current must in all cases correspond to the
output current calculated for the respective level.
Note:
You have to determine the permissible deviation of the values your-
self. This deviation depends on the the accuracy requirements of your
measurement loop. For this, determine the permissible tolerance for
the deviation.
8.7 Parameteradaptationsaftertherstsetup
In the case of further parameter adjustments after initial setup, the de-
vice checks the current checksum (CRC) of the parameters respec-
tively.Thisdetermineswhetherqualiedmeasurementdataarestill
available for safety-oriented instrumentation.
Note:
If the current checksum is identical to the last checksum, the setup
assistant no longer needs to be run through. In this case, the param-
eter adjustment is completed by simply " Verify and lock".