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

Control of the safety functions
5.6 Control of the Extended/Advanced Functions via F-DI (for CU310-2)
5.6.2

Overview of the F-DIs

Description
Failsafe digital inputs (F-DI) consist of 2 digital inputs. At the 2nd digital input, the cathode
(M) of the optocoupler is additionally brought out to enable connection of an output of an
failsafe control grounded through a switch. (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.
Explanation of terms:
NC contact / NC contact: To select the safety function, a "zero level" must be present at both
inputs.
NC contact / NO contact: 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- 20
Module
CU310-2
F-DI features
● Failsafe 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 208)".
● Configurable connection of NC/NC or NC/NO contacts by means of parameter p10040
● Status parameter r10051
244
Overview of the failsafe inputs in the SINAMICS S120/S150 List Manual:
Function diagram
2870
Inputs
F-DI 0 ... 2
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated