Examples Of How The Safety Functions Can Be Applied - Siemens Sinamics S120 Function Manual

General information about SINAMICS Safety Integrated

2.4 Examples of how the safety functions can be applied

2.4 Examples of how the safety functions can be applied
Sa fety function Ap plication examples
STO It is only permissible to open a protective door if the
motor torque has been switched off.
A central Emergency Stop button ensures that
several drives cannot unintentionally start.
SS1 The drive must brake as quickly as possible after
the Emergency Stop button has been pressed. It is
not permissible that the stationary motor undesira-
bly accelerates.
SBC Safe control of a motor holding brake must be
guaranteed to guarantee the motor is at a stand-
still.
SOS The standstill position of the motor must be moni-
tored and ensured.
SS2 The drive must brake as quickly as possible after
the stop button has been pressed. The standstill
position of the motor must be monitored and en-
sured.
SLS The machine operator must be able to enter the
machine after the protective door has been opened
and slowly move a horizontal conveyor with an
acknowledgment button in the danger zone.
A spindle drive, depending on the selection of the
cutting tool, must not exceed a specific maximum
speed.
SSM A centrifuge may only be filled below a velocity
defined by the user.
SDI A protective door must only be opened if a drive
moves in the safe direction (away from the opera-
tor).
When replacing the pressure cylinders of the
plates, the drive must only move in the safe direc-
tion of rotation.
Once the protection against jamming has been
triggered, a roller shutter gate must only be able to
start moving in one direction.
At an operational limit switch, the trolley of a crane
must only start in the opposite direction.
30
Po ssible solution
Select STO in the converter via a terminal or
•
via PROFIsafe.
The pulses are suppressed and the motor
•
coasts to a standstill.
Evaluating the Emergency Stop button in a cen-
tral controller, selecting STO in the converter via
PROFIsafe.
Select SS1 in the converter using a fail-safe input
or via PROFIsafe .
SBC is (if configured) initiated together with STO.
The Motor Module / Safe Brake Relay / Safe
Brake Adapter then carries out the action and
safely controls the outputs for the brake.
Select SOS, e.g. through SS2, in order to monitor
the standstill position of the motor after braking.
Select SS2in the converter using a fail-safe input
or via PROFIsafe.
Selecting SLS in the converter. The converter
limits and monitors the velocity of the horizontal
conveyor.
Selecting SLS and the corresponding SLS level
in the converter via PROFIsafe.
If the Extended Functions are enabled, SSM is
always . The function does not have to be se-
1)
lected.
The converter safely monitors the centrifuge
speed and enables the process to advance to the
next step using the "SSM status" bit.
Exception: Motion monitoring without selection
1)
(Page 205)
Selecting SDI in the converter; enable the protec-
tive doors via status bit (PROFIsafe) of the con-
verter.
Selecting SDI in the converter. Disabling the
hazardous direction of rotation.
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated