Parameterizing/addressing
9.4 Description of parameters
SIPART PS2 with and without HART
188 Operating Instructions, 10/2013, A5E00074631-11
Description of parameter G
G. OPEN - displacement of upper end stop
Note
Fault detection
The monitoring unit for the displacement of the upper end stops does not only respond to the
fault in the valve. If the limit thresholds of the
displacement of the upper end stop are
exceeded due to the misalignment of position feedback, the misalignment also triggers a
diagnostics message.
Use this parameter to activate the test to monitor the displacement of the upper end stop.
The test is executed whenever the valve is in the "up tight closing" position. The test checks
whether the value of the upper hard end stop has changed with respect to its value at the
time of initialization (end stop P100).
Configure the following settings to activate the test:
1. Ensure that the parameter "YCLS" manipulated variable tight closing parameter is set to
values "uP" or "do uP".
2. Set the "G.
OPEN" parameter to "On". Sub-parameters to set the test parameters are
displayed. The test is activated.
3. Set the suitable parameter values in sub-parameters. The setting options available in
sub-parameters are described below.
The current displacement of the upper end stop is displayed in the "18 OPEN" diagnostics
parameter. The positioner triggers a fault message if the current value exceeds a threshold.
If the value exceeds a threshold, the fault message is saved in a power fail-safe manner
until:
● No fault occurs during a repeat test.
● The device is re-initialized.
● The "G.
OPEN" parameter is deactivated.
The factory setting is "OFF".
Use this sub-parameter to set a threshold in percent. Use threshold 1 to monitor the upper
hard end stop. Set the threshold in a range from "0.1" to "10.0".
The positioner triggers a fault message if the difference between the upper hard end stop
and the initialization value exceeds threshold 1. The process to activate and display this fault
message is described in the "XDIAG" parameter.
The factory setting is "1.0".
To Next Page
Loading...
