Testing The Switch--Off Signal Paths - Siemens Sinumerik 840D sl Function Manual

10/15
S Drive (CU) SI, integrated in the drive
-- The requirement to cancel the pulses is detected. Mechanisms then start
that are also executed when STO is selected for the safety functions integra-
ted in the drive:
-- 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 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 drive--integrated monitoring function in the Motor Module identifies the
requirement to cancel the pulses, then the same mechanisms are started
that are carried out for an STO selection of the safety functions integrated in
the drive and an STO 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
STO is initiated.
6.1.2 Testing the switch- - off signal paths
Description
The test stop is used to check the shutdown paths of both monitoring channels.
There is a test stop input (drive SGE). The acknowledgment is realized via the
drive SGA "status pulses cancelled". The pulse cancellation must be simulta-
neously initiated through both shutdown paths due to the fact that the Motor
Modules and drive closed--loop control are cross--checked.
The user (machine manufacturer) must configure the execution of the test stop
phase.
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Safety functions integrated in the system/drive
6.1 Safe standstill (SH)
6-113