Operating instructions

Parameterizing/addressing
10.4 Description of parameters
SIPART PS2 with and without HART communications
158 Operating Instructions, 09/2008, A5E00074631-08
10.4.2.18 Description of parameters 49
49.
LIM - Response threshold of fault message
This parameter is used to set a value for the permissible size of the regulation deviation to
trigger a fault message. The value is given in percent.
If the parameters "48.
TIM" and "49. LIM" are set to "Auto", then the fault message is set if
the slow motion zone is not reached within a certain period of time. The setting "Auto" is the
factory setting. Within 5 to 95% of the actuator travel, this time is twice the initialization set
time, and ten times the initialization set time outside of 10 to 90%.
Note
Activated tight closing function
If the tight closing function is activated, then for parameter "49.
LIM" the monitoring of
regulation deviation is turned off in the appropriate overflow direction. Here, "YCDO: < 0 %"
and "YCUP: > 100 %" apply. This functionality is especially advantageous for valves with soft
seats. For a long-term monitoring of the end stop positions, we recommend activating the
parameters "F.
ZERO" and G. OPEN".
10.4.2.19 Description of parameters 50
50.PRST - Preset
These parameters are used to restore the factory settings and reset initialization. To do this,
press the increment button
for at least five seconds.
In particular when the positioner was already used previously on a different actuator, you
must always restore factory settings before a fresh initialization. Only in this way can you
start from known starting conditions. The parameter "PRST" is available for this purpose.
It is recommended to restore factory settings when you have changed many parameters at
once but cannot predict their effect, and there are then undesired reactions.
Note
If you have activated the "Preset" parameter value for the factory setting, then you must
reinitialize the positioner. All previously configured maintenance parameters will be deleted.