Overview Of The F-Dis - Siemens Sinamics S120 Function Manual

Cont rol of the safety functions
5.6 Control of the Extended Functions via F-DI (for CU310-2)
5.6.1

Overview of the F-DIs

Description
Fail-safe digital inputs (F-DI) consist of 2 digital inputs. For the 2nd digital input, in addition
cathode (M) of the optocoupler is fed out in order to allow the connection of an output of an F
control system with switched ground (for this purpose, the anode must be connected to 24 V
DC).
Parameter p10040 is used to determine whether an F-DI is operated as NC/NC or NC/NO
contact. The status of each DI can be read at parameter r10051. The same bits of both drive
objects are logically linked by AND operation and return the status of the relevant F-DI.
Test signals from F-DOs and interference pulses can be filtered out using the input filter
(p10017), so that they do not cause any faults.
E x planation of terms:
NC c ontact / NC c ontact: To select the safety function, a "zero level" must be present at both
inputs.
NC c ontact / NO c ontact: To select the safety function, a "zero level" must be present at
input 1 and a "1 level" at input 2.
The signal states at the two associated digital inputs (F-DI) must assume the same status
configured in p10040 within the monitoring time set in p10002.
The digital inputs of the CU310-2 cannot be dynamized by a test stop.
Table 5- 15
Mo dule
CU310-2
F-DI features
● Fail-safe configuration with 2 digital inputs per F-DI
● Input filter to block test signals with an adjustable suppression time (p10017), see
Chapter "Bit pattern test (Page 173)".
● Configurable connection of NC/NC or NC/NO contacts by means of parameter p10040
● Status parameter r10051
● Adjustable time window for monitoring discrepancy at both digital inputs by means of
parameter p10002 for all F-DIs
Not e
Dis crepancy t ime
To avoid incorrect triggering of fault messages, at these inputs the discrepancy time must
always be set less than the shortest time between 2 switching events (ON/OFF,
OFF/ON).
200
Overview of the fail-safe inputs in the SINAMICS S120/S150 List Manual:
Fu n ction diagram
2870
In puts
F-DI 0 ... 2
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated