Safety Faults - Siemens Sinumerik 840D sl Function Manual

Safety Functions integrated in the drive
4.7 Commissioning the STO, SBC and SS1 functions
4.7.3

Safety faults

The fault messages of the Safety Basic Functions are saved in the standard
message buffer and can be read out from there.
Stop response
When faults associated with Safety Integrated Basic Functions occur, the following
stop responses can be initiated:
Table 4-4
Stop
response
STOP A
cannot be
acknowl-
edged
STOP A
STOP F
4-80
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Stop responses for Safety Integrated Basic Functions
Action
Trigger safe pulse
suppression via the
switch--off signal path for
the relevant monitoring the relevant monitoring
channel.
For operation with SBC:
The brake is closed.
STOP A corresponds to stop Category 0 to EN 60204--1.
With STOP A, the motor is switched directly to zero torque via the Safe
Torque Off (STO) function.
A motor at standstill cannot be started again accidentally.
A moving motor coasts to standstill. This can be prevented by using external
braking mechanisms, e.g. holding or operational brake.
When STOP A is present, Safe Torque Off (STO) is active.
Transition into STOP A
(after a delay time that can
be parameterized)
STOP F is permanently assigned to the crosswise data comparison (CDC). In
this way, errors are detected in the monitoring channels.
After STOP F, STOP A is initiated.
When STOP A is present, Safe Torque Off (STO) is active.
Effect
For all non--acknowledgeable
safety faults with pulse
The motor
suppression.
coasts to a
standstill or is standstill or is
braked by the
For all acknowledgeable safety
holding brake.
faults with pulse disable.
As a subsequent response to
STOP F.
Follow--up If a fault occurs in the
response crosswise data comparison.
STOP A with
adjustable
delay (default
setting with-
out delay) if
one of the
selected
Safety
functions is
selected
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10/15
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