Operating instructions

Parameterizing/addressing
10.4 Description of parameters
SIPART PS2 with and without HART communications
Operating Instructions, 09/2008, A5E00074631-08
157
10.4.2.16 Description of parameters 47
47.
FCT - Fault message function
The fault message in the form of monitoring of control deviation over time can also be
triggered due to the following events:
● Power failure
● Processor fault
● Actuator fault
● Valve fault
● Compressed air failure
● Threshold 3 error message in advanced diagnostics
See Description of parameters 51 (Page 159), 51.XDIAG activation of advanced
diagn
ostics.
Note that the fault message cannot be switched off. It can however be suppressed (factory
setting) when you switch over to "No automatic mode". If you want to generate a fault
message here too, you must the parameter "47.
FCT" to " nA".
You also have an option to "or" the fault message with the status of the binary inputs. To do
this, set the "47.
FCT" parameter to " nAb".
Select the setting "-
" if you want to output the fault message inverted to the alarm or SIA
unit.
The factory setting is "
".
10.4.2.17 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".