Siemens SIPART Series Operating Instructions Manual page 174

Parameterizing/addressing
9.4 Description of parameters
9.4.2.17 Description of parameters 48
48. TIM - Monitoring time for setting of fault messages
This parameter is used to set the time in seconds within which the positioner must have
reached the regulated condition. The corresponding response threshold is specified in the
"49. LIM" parameter.
When the configured time is exceeded, the fault message output is set.
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".
9.4.2.18 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".
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SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11