Parameter assignment/Addressing
10.2 Description of parameters
SIPART PS2 with PROFIBUS communication
158
Operating Instructions, 09/2007, A5E00127926-07
10.2.2.21
Description of parameter 51
51.FSVL - safety setpoint
Default value of the safety position.
Note that the "FSVL" safety setpoint of 0% always refers to the mechanical position in which
the actuator is depressurized. The mechanical position is especially important if you have set
the "6.SDIR" parameter to "FALL" and expect 100% mechanical position at 0% setpoint
default. The "6.SDIR = FALL" setting corresponds a declining characteristic curve of the
setpoint.
The factory setting is "0.0".
See also
Description of parameter 6 (Page 145)
10.2.2.22
Description of parameter 52
52.STNR - station number
A separate station number must be set on each device in order to address the devices on
the bus separately.
The factory setting is "126".
10.2.2.23
Description of parameter 53
53.IDENT - device operating mode
The positioner identifies two device operating modes with respect to the response to the DP
master of class 1:
●
[0] profile-compliant:
can be replaced with positioners of other manufacturers complying with PROFIBUS PA
profile 3.0.
●
[1] profile-compliant with extensions:
complete functional range of the positioner (condition at delivery).
Note
A specific GSD file is allocated to every device operating mode.
If the configuration of your PROFIBUS PA path does not match the set device operating
mode, the device cannot accept the cyclic data exchange. The station number and the
device operating mode cannot be modified during ongoing communication with a master
of class 1.
A successfully established connection with a cyclic master can be detected when the
positioner responds to the setpoint of the master.
