Siemens SINAMICS S120 Function Manual page 317

Forced checking procedure (test stop): Duration
The maximum time period for the test is: T
● Test of the FDIs: T
(X = 20 ms or r10015 or p10017 - the longest time of the 3 values determines the waiting
time X)
● Test of the FDOs: T
(Y = p10001 or r10015 or p10017 - the longest time of the 3 values determines the wait
time Y)
The safety functions of the TM54F are executed in the sampling time displayed in r10015.
This sampling time corresponds to the lowest value of the communication sampling time
entered in p10000[0..5].
Testing failsafe I/O
Fail-safe inputs and outputs must be tested for fail safety in defined time intervals (test stop
or forced dormant error detection). For this purpose, SINAMICS S120 contains a function
block which carries out this forced dormant error detection when selected via a BICO source.
A timer is started after every error-free test stop to monitor the time until the next required
test. After this time interval (p10003) has expired, and each time the Control Unit is switched
on, the user is notified via message A01774 that a test stop must be performed for the
F I/DO.
● Three test stop modes can be selected for testing the output (see following sections).
● The failsafe digital inputs must be checked by whoever carries out the forced dormant
error detection.
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Test stop
= 3 · r10015 + 3 · X ms
FDIs
= 8 · r10015 + 6 · Y ms
FDOs
6.10 Commissioning TM54F
= T + T
FDIs FDOs
Commissioning
315