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Parameter assignment/Addressing
10.2 Description of parameters
C1.LIMIT - limit of the leakage indicator
Use this sub-parameter to set the limit of the leakage indicator in percent. Set the limit in a
range from "0.1" to "100.0". There is no leakage if the limit is less than "30.0".
Utilize the complete sensitivity of the leakage detection as follows:
1. After initializing the positioner automatically, use a calibration device to initiate a ramp
movement.
2. Conditions for the ramp movement:
3. During the ramp movement, the "15 ONLK" diagnostics parameter provides information
about the actual values. Define the limit of the leakage indicator accordingly.
The positioner triggers a fault message if the current value exceeds one of the three
configurable limit thresholds. How to set the three limit thresholds is described below.
The factory setting is "30.0".
C2.FACT1 - factor 1
Use this sub-parameter to set the factor for the formation of limit threshold 1. Set the factor in
a range from "0.1" to "100.0". The limit threshold is the product of "C1.LIMIT" and
"C2.FACT1".
The threshold 1 fault message is displayed when the limit threshold 1 exceeds. The process
to activate and display this fault message is described in the "XDIAG" parameter.
The factory setting is "1.0".
C3.FACT2 - factor 2
Use this sub-parameter to set the factor for the formation of limit threshold 2. Set the factor in
a range from "0.1" to "100.0". The limit threshold is the product of "C1.LIMIT" and
"C3.FACT2".
The threshold 2 fault message is displayed when the limit threshold 2 exceeds. The process
to activate and display this fault message is described in the "XDIAG" parameter.
The factory setting is "1.5".
C4.FACT3 - factor 3
Use this sub-parameter to set the factor for the formation of limit threshold 3. Set the factor in
a range from "0.1" to "100.0". The limit threshold is the product of "C1.LIMIT" and
"C4.FACT3".
The threshold 3 fault message is displayed when the limit threshold 3 is exceeded. The
process to activate and display this fault message is described in the "XDIAG" parameter.
The factory setting is "2.0".
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– The ramp must cover the normal operating range of the valve.
– The steepness of the ramp must match the dynamic requirements of the
corresponding application.
SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07
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