Bit Pattern Test - Siemens Sinumerik 840D sl Function Manual

Safety Functions integrated in the drive
4.6 Control via terminals on the Control Unit and the power unit
"Simultaneously" means:
The changeover must be completed in both monitoring channels within the para-
meterized tolerance time.
S p9650 SI SGE changeover tolerance time (Control Unit)
S p9850 SI SGE changeover tolerance time (Motor Module)
Note
To avoid incorrect triggering of fault messages, at these outputs the tolerance time
must always be set smaller than the shortest time between two switching events
(ON/OFF, OFF/ON).
If the Safe Torque Off function is not selected/deselected within the tolerance time,
this is detected by the crosswise data comparison, and fault F01611 or F30611
(STOP F) is output. In this case, the pulses have already been canceled as a
result of the selection of Safe Torque Off in one channel.
4.6.2

Bit pattern test

Bit pattern test of fail- -safe outputs
The converter normally responds immediately to signal changes in its fail--safe
inputs. This is not desirable in the following case: Several control modules test
their fail--safe outputs using bit pattern tests (on/off tests) to identify faults due to
either short or cross circuits. When you interconnect a fail--safe input of the conver-
ter with a fail--safe output of a control module, the converter responds to these test
signals.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
© Siemens AG 2015 All Rights Reserved
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