'42.A1' / '43.A2' Alarm Response Threshold; '44.\\Fct' Function Fault Message - Siemens SIPART PS2 Operating Instructions Manual

Parameter assignment
8.3 Description of parameters
8.3.2.15

'42.A1' / '43.A2' Alarm response threshold

Adjustment range:
Purpose:
Factory setting:
8.3.2.16

'44.\\FCT' Function fault message

Condition:
Possible settings:
Purpose:
Factory setting:
156
0.0 ... 100.0
These parameters are used to specify when an alarm should be
displayed. The response thresholds of the alarms (in percent) refer
to the MPOS scale in the '34.YNRM' Manipulated variable stand‐
ardization (Page 149) parameter. The MPOS scale corresponds to
the mechanical travel.
Depending on the setting of the alarm function in the '41.AFCT'
Alarm function (Page 154) parameter, the alarm is triggered upon
an upward violation (Max) or downward violation (Min) of this re‐
sponse threshold.
With 'A1': 10.0
At least one of the following modules is fitted
● Alarm module
● Slot initiator alarm module (SIA module)
● Mechanical limit switch module
Normal direction of action
●
● nA
● nAb
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 message of extended diagnostics.
See parameter '50.XDIAG' Activation of extended diagnostics
(Page 160).
The fault message cannot be switched off, but it can be suppressed
(factory setting) when you exit 'Automatic' mode. Set the ' FCT'
parameter to ' nA' to also generate a fault message here.
You also have an option to "or" the fault message with the status of
the binary inputs. To do this, first set the '39.BIN1' / '40.BIN2' Func‐
tion of binary inputs (Page 153) parameter to 'on' or '-on'. Subse‐
quently set the ' FCT' parameter to ' nAb'.
Select the '- ' setting if you want the fault message to be output with
inverted direction of action.
With 'A2': 90.0
Inverted direction of action
● -
● - nA
● - nAb
SIPART PS2 with PROFIBUS PA
Operating Instructions, 05/2019, A5E00127926-AC