F-Di Function - Siemens SINAMICS G130 Manual

Controlling the safety functions
7.4 Control via TM54F / option K87
Note
You have the following options of acknowledging TM54F faults after troubleshooting:
• POWER ON
• Falling edge in signal "Internal Event ACK" with subsequent acknowledgement on the
The signal states of the two digital inputs of the F-DI are frozen at logical 0 (safety function
selected) when different signal states are present within a fail-safe F-DI of the TM54F, until a
safe acknowledgment has been carried out by means of an F-DI via parameter p10006 (SI
acknowledgment internal event input terminal) or the extended alarm acknowledgment has
been carried out.
The monitoring time (p10002) for the discrepancy of the two digital inputs of an F-DI may
have to be increased so that switching operations do not trigger an undesired response,
thereby necessitating a safe acknowledgment. Therefore, the signal states at the two related
digital inputs (F-DI) must have the same state within this monitoring time, otherwise the
following fault will be output F35151 TM54F: Discrepancy error. This requires safe
acknowledgement.
Note
The discrepancy time must be set so that it is always smaller than the smallest expected
switching interval of the signal to this F-DI.
7.4.1.2

F-DI function

Description
Fail-safe digital inputs (F-DI) consist of two digital inputs. The cathode (M) of the optocoupler
is routed to the second digital input to allow the connection of an M-switching F-DO output
(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 DI can be read at parameter r10051 for the drive objects TM54F_MA
and TM54F_SL. 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 controllers can be filtered out using parameter p10017, so that faults are
not incorrectly interpreted.
Explanation of terms:
NC contact / NC contact: to select the safety function, a "zero level" must be present on both
inputs.
NC contact / NO contact: to select the safety function, a "zero level" at input 1 and a "1 level"
at input 2 must be present.
176
Control Unit.
Safety Integrated
Function Manual, 05/2010, A5E03264275A