Examples Of How The Safety/Diagnostic Functions Can Be Applied - Siemens SINAMICS S120 Function Manual

General information about SINAMICS Safety Integrated

2.4 Examples of how the safety/diagnostic functions can be applied

2.4 Examples of how the safety/diagnostic functions can be applied
Safety function Application 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 A drive must brake as quickly as possible after the
Emergency Stop button has been pressed. It is not per-
missible that the stationary motor undesirably acceler-
ates.
SBC Safe control of a motor holding brake must be guaran-
teed to guarantee the motor is at a standstill.
SOS The standstill position of the motor must be monitored
and ensured.
SS2 A drive must brake as quickly as possible after the
Emergency Stop button has been pressed. The stand-
still position of the motor must be monitored and en-
sured.
SLS The machine operator must be able to enter the ma-
chine after the protective door has been opened and
slowly move a horizontal conveyor with an acknowledg-
ment 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 operator).
When replacing the plates of the pressure cylinders, the
drive must only move in the safe direction of rotation.
Once the protection against jamming has been trig-
gered, 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.
34
Possible 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
central controller, selecting STO in the con-
verter via PROFIsafe.
Select SS1 in the converter using a failsafe
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 SS2 in the converter using a failsafe
input or via PROFIsafe.
Selecting SLS in the converter. The converter
limits and monitors the velocity of the horizon-
tal conveyor.
Selecting SLS and the corresponding SLS
level in the converter via PROFIsafe.
If the Extended Functions are enabled, SSM
is always available . The function does not
1)
have to be selected.
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 selec-
1)
tion (Page 249)
Selecting SDI in the converter; enable the
protective doors via status bit (PROFIsafe) of
the converter.
Selecting SDI in the converter. Disabling the
hazardous direction of rotation.
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated