Siemens SIPART PS2 Service Manual page 67

Figure A-4
Profibus Parameters
The following safety parameters are accessible using the local pushbuttons or Siemens'
SIMATIC PDM
FSTY, Fail Safe Type: Determines position of actuator upon loss of digital communication.
This parameter has three choices:
FSVL, Fail Safe Value: Positioner will drive actuator to "FSVL" position, see FSVL
parameter.
FSSP, Fail Safe Setpoint: Positioner will stay at last known setpoint before communication
loss.
PS2 Troubleshooting Guide
Service Manual, 03/2017, A5E36661550-AA
Figure A-4 Reaction to failure of auxiliary power with fail in place
software.
1
A.4 SIPART PS2 Valve Positioner Fail-Safe Positions
Appendix A
65