Safe Acceleration Monitor (Sam) - Siemens SINAMICS S120 Function Manual

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
4.2.13

Safe Acceleration Monitor (SAM)

The "Safe Acceleration Monitor" (SAM) function is used to safety monitor braking along the
OFF3 ramp. The function is active for SS1, SS2 or STOP B and STOP C.
Features
As long as the speed is less, the converter continuously adds the adjustable tolerance p9548
to the actual speed so that the monitoring tracks the speed. If the speed is temporarily
higher, the monitoring remains at the last value. The converter reduces the monitoring
threshold until the "Shutdown speed" has been reached.
SAM recognizes if the drive accelerates beyond the tolerance defined in p9548 during the
ramp-down phase, and generates a STOP A. The monitoring is performed as follows:
● Monitoring with SAM is activated for SS1 (or STOP B) and SS2 (or STOP C).
● The SAM limit value is frozen after the speed limit in p9568 is undershot.
● SAM monitoring continues until the transition time to SOS/STO expires.
Note
Relationship between SSM and SAM
If 0 is entered for p9568, the speed limit of the SSM function (p9546) is also used as
minimum limit value for the SAM function (safe acceleration monitoring). If the speed is
below this limit, SAM no longer triggers a response from the drive.
In this case, the effects of safe acceleration monitoring are therefore significantly restricted if
a relatively high SSM velocity limit is set when using the SS1 and SS2 stop functions.
Note
No direct selection of SAM
SAM is part of the Safety Integrated Extended Functions SS1 and SS2 or STOP B and
STOP C. SAM cannot be individually selected.
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Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated