Overview Of The F-Dis - Siemens SINAMICS S120 Function Manual
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Control of the safety functions
5.4 Control via TM54F
5.4.3
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 a
failsafe controller 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 bits of both drive
objects are logically AND'ed 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.
To enable the forced checking procedure (test stop), connect the digital inputs of F-DI 0 ... 4
of the TM54F to the dynamic voltage supply L1+ and the digital inputs to F-DI 5 ... 9 to L2+.
Additional information for the forced checking procedure (test stop) is provided in Chapter
"Forced checking procedure (test stop) (Page 172)".
Table 5- 16
Module
TM54F
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 p10040
● Status parameter r10051
● Adjustable time window for monitoring discrepancy at both digital inputs by means of
parameter p10002 for all F-DIs
232
Overview of the failsafe inputs in the SINAMICS S120/S150 List Manual:
Function diagram
2893
2894
Inputs
F-DI 0 ... 4
F-DI 5 ... 9
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated
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