8.4.2.18 '48.\\TIM' Monitoring period for setting of fault message 'Control deviation'
Possible settings: ● Auto
● 0 ... 100
Purpose: The 'TIM' parameter is used to set the time in seconds within which
the positioner must have reached the regulated condition. The cor‐
responding response threshold is specified in the parameter.
When the configured time is exceeded, the fault message output is
set.
Factory setting: Auto
Note
Activated tight closing/fast closing function
If the function is activated, then for the ' LIM' parameter the monitoring of control deviation is
turned off in the appropriate overflow direction. The following applies: 'YCDO: < 0 %' and
'YCUP: > 100 %'. This functionality is especially advantageous for valves with lining. For long-
term monitoring of the end positions, we recommend that you activate the 'F. ZERO' and 'G.
OPEN' parameters.
8.4.2.19 '49.\\LIM' Response threshold of fault message 'Control deviation'
Possible settings: ● Auto
● 0 ... 100
Purpose: This ' LIM' parameter is used to set a value for the permissible size
of the control deviation to trigger a fault message. The value is given
in percent.
If the ' TIM' and ' LIM' parameters are set to 'Auto', then the fault
message is set if the slow step zone is not reached within a certain
period of time. Within 5 to 95% of the actuator travel, this time is
twice the initialization travel time, and ten times the initialization
travel time outside of 10 to 90%.
Factory setting: Auto
Note
Activated tight closing/fast closing function
If the function is activated, then for the ' LIM' parameter the monitoring of control deviation is
turned off in the appropriate overflow direction. The following applies: 'YCDO: < 0 %' and
'YCUP: > 100 %'. This functionality is especially advantageous for valves with lining. For long-
term monitoring of the end positions, we recommend that you activate the 'F. ZERO' and 'G.
OPEN' parameters.
Parameter assignment
8.4 Description of parameters
SIPART PS2 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E00074631-AE 159
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