Siemens PROFIBUS PA SIPART PS2 Manual page 104

Operation
55.STNR
56.IDENT
.
102
Station number
So that the devices on the bus can be addressed separately, a sepa-
rate station number must be set on each device.
Device operating mode
The SIPART PS2 PA positioner recognizes two device operating
modes for its behavior in relation to DP masters class1:
[0] profile conformity: exchangeable for positioners from other suppliers
to PROFIBUS--PA profile 3.0
[1] profile conformity with extensions: full scope of function of SIPART
PS2 PA (condition as delivered)
NOTE
Each device operating mode has a particular device master data file
(GSD) assigned to it.
[0]: pa_9710.GS*
[1]: SIS18079.GS*
If the configuration of your PROFIBUS--PA channel does not
correspond to the device operating mode set, the device will not pick
up the cyclic data exchange. The station number and device operating
mode cannot be changed during communication with a master of
class 1.
Successful establishment of communications with a cyclical master
(chapter 5.3 page 127) can be recognized by the positioner responding
to the set value from the master. A flashing decimal point in the top
line of the display denotes an acyclic master (chapter 5.2 page 119).
SIPART PS2 PA Manual
A5E00127926-03