Safety Faults - Siemens SINAMICS S120 Function Manual
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- Function manual (982 pages) ,
- Diagnostic manual (947 pages) ,
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Safety Integrated Basic Functions
10.10 Commissioning the "STO", "SBC" and "SS1" functions
10.10.3
Safety faults
The fault messages of the Safety Integrated Basic Functions are saved in the standard
message buffer and can be read out from there.
When faults associated with Safety Integrated Basic Functions occur, the following stop
responses can be initiated:
Table 10- 10 Stop responses for Safety Integrated Basic Functions
Stop re-
sponse
STOP A
cannot be
acknow-
ledged
STOP A
STOP F
Danger to life due to an uncontrolled movement of the axis
With a vertical axis or pulling load, there is a risk of uncontrolled axis movements when
STOP A/F is triggered. This can cause serious injury or death to persons in the danger
zone.
• If there is a hazard due to undesirable or unwanted motion in your application, take
714
Triggered ...
For all Safety faults with
pulse suppression that
cannot be acknowledged.
For all acknowledgeable
Safety faults
As a follow-up reaction of
STOP F
STOP A corresponds to Stop Category 0 in accordance with 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 operating brake.
When STOP A is present, "Safe Torque Off" (STO) is active.
If an error occurs in the
data cross-check.
STOP F is permanently assigned to the data cross-check (DCC). In this way, errors
are detected in the monitoring channels.
After STOP F, STOP A is triggered.
When STOP A is present, "Safe Torque Off" (STO) is active.
WARNING
measures to counter it, for example, by using a brake with safe monitoring. For further
information, see Chapter "Safe Brake Control (SBC) (Page 689)."
Action
Trigger safe pulse sup-
pression via the switch-off
signal path for the rele-
vant monitoring channel.
During operation with
SBC:
Apply motor holding
brake.
Transition to STOP A.
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Effect
The motor coasts to a stand-
still or is braked by the hold-
ing brake.
Follow-up response STOP A
with adjustable delay (factory
setting without delay) if one
of the safety functions is
selected
Drive functions
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