Siemens SINUMERIK 840D sl Function Manual page 103

03.06
S Drive (CU) SI, integrated in the drive
– The requirement to cancel the pulses is detected. Mechanisms then start
that are also executed when SH is selected for the safety functions inte-
grated in the drive:
– Initiating pulse cancellation
– The timer routine is started to check the feedback. After the timer has
expired (in the next monitoring clock cycle integrated in the drive), using
the feedback signal, it is checked as to whether the pulses have been
cancelled via this shutdown path.
– If p9602=1, then safe brake control is executed.
Shutdown path of the monitoring channel, control
If the higher-level control with its motion monitoring identifies that it is necessary to
cancel the pulses, then the following sequence applies:
S NCK Motion Monitor
– The control communicates to the Motor Modules the requirements to cancel
the pulses.
S Drive (MM), SI, integrated in the drive
– If the monitoring function integrated in the drive in the Motor Modules identi-
fies the requirement to cancel the pulses, then the same mechanisms are
started that are carried-out for an SH selection of the safety functions inte-
grated in the drive and an SH is initiated:
– Initiating the pulse cancellation
– The timer routine is started to check the feedback. After the timer has
expired (in the next monitoring clock cycle integrated in the drive), using
the feedback signal, it is checked as to whether the pulses have been
cancelled via this shutdown path.
– If p9802=1, then safe brake control is executed.
– If the Motor Module detects that communications to the NCK have failed,
then this is identified by the safety functions integrated in the drive and an
SH is initiated.
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
Safety Functions Integrated in the System/Drive
6.1 Safe standstill (SH)
6-103