Siemens Sinamics S120 Function Manual page 203

Safe s tate signal selection
For the CU310-2, the following (Safe State) signals can be requested via p10039[0...3]:
● STO active (power removed/pulses suppressed)
● SS1 active
● SS2 active
● SOS active
● SLS active
● SDI positive active
● SDI negative active
● SLP active
Image 5-6
The same signals (high-active) are logically AND'ed. The different signals selected via
p10039 are logically OR'ed. Result of these logic operations is the "Safe State". Details can
be found in function block diagram 2876, see SINAMICS S120/S150 List Manual.
F-DO features
● Each F-DO with fail-safe configuration consisting of 2 digital outputs plus one digital input
for checking the switching state for forced dormant error detection (test stop)
● Status parameters r10051/r10052
Not e
Dis play using r0747.16
If digital outputs DO16+ and DO16- act as F-DO, parameter r0747 "CU, digital outputs
status", bit 16 "DO 16 (- / X130.7, 8)" does not display the level defined by Safety Integrated.
Instead, it displays the ineffective setpoint state according to BICO signal source p0746 "BI:
CU signal source for terminal DO 16".
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
5.6 Control of the Extended Functions via F-DI (for CU310-2)
Safe state selection
Control of the safety functions
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