Technical data

Safety Integrated Functions
8.5 Safety Integrated Extended Functions
Function Manual
Function Manual, 06/2012, 6SL3097-4AB10-0BP4
411
F-DI/F-DO forced dormant error detection
For forced dormant error detection of the F-DI, the level of the F-DI must be inverted, e.g. by
activating the appropriate switch or triggering the appropriate function in the connected
safety control. The correct reaction to the level change on the F-DI must be observed by the
person carrying out the operation.
If the F-DO is used, it must undergo forced dormant error detection by triggering the
appropriate functions in the drive and the resulting level changes on the F-DO.
The correct function of the F-DO must be checked by whoever carries out forced dormant
error detection or the test stop. The required format of the check is determined by the F-DO
interconnection.
The test stop must be executed at a suitable time. That is, it must be initiated specific to the
application. This functionality is implemented by means of a parameter p10007 which can be
wired via BICO either to an input terminal on the drive unit (Control Unit), or to an IO-PZD in
the drive telegram.
● F-DO at an F-DI of a safety device
(as illustrated in the section titled "Application examples/Input/output interconnections for
a safety switching device with CU305)
⇒ In the case of dormant error detection for the F-DO, its two output drivers are checked
by the F-DI of the connected safety device to ensure that they are functioning correctly.
● F-DO at two contactors with positively-driven auxiliary contacts
(see the section titled Application examples/Interconnection of F-DO with redundant
contactors)
⇒ The feedback contacts of both contactors have to be monitored by a controller or
another monitoring unit to ensure that they both close when the F-DO is switched off (see
Application examples (Page 455)).
● Whe
n connecting other loads, remember that the correct function of the two output
drivers has to be monitored separately where forced dormant error detection is
concerned.
You will find more instructions for carrying out test stops in the chapter Test stop (Page 440).
WARNING
For the SINAMICS S110 drive system, to perform a self test, a POWER OFF/POWER ON
1)
must be performed for the Control Unit at least once a year. This also applies, if the forced
checking procedure of the safety functions takes place more frequently than once per year.
1)
For SINAMICS S110, the Control Unit can also be supplied from the line connection of the
Power Module. For SINAMICS S110, a POWER OFF/POWER ON means line supply off/on
for the Power Module and – if one is being used – also for the 24V power supply.