Technical data

Safety Integrated Functions
8.2 General information about SINAMICS Safety Integrated
Function Manual
338 Function Manual, 06/2012, 6SL3097-4AB10-0BP4
Monitoring with an encoder
The Safety Integrated functions with encoder are configured using p9506 = p9306 = 0 in the
expert list (factory setting) or by selecting "with encoder" in the Safety screen form.
The Safe Acceleration Monitor (SAM) recognizes if the drive accelerates beyond the
tolerance defined in p9348/p9548 during the ramp down phase, and generates a STOP A.
The monitoring function is activated for SS1 (or STOP B) and SS2 (or STOP C) and is
deactivated after the speed drops below the value set in p9368/p9568.
You can find more detailed information on the Safe Acceleration Monitor later on in this
manual.
Monitoring without an encoder
The encoderless Safety Integrated functions are configured in the expert list using p9506 =
p9306 = 1 or p9506 = p9306 = 3 or by selecting "without encoder" in the Safety screen form.
For speed monitoring without encoder, the drive is braked along a ramp, which is defined
using Safe Brake Ramp (SBR encoderless). The gradient of the brake ramp is defined using
a reference speed (p9581/p9381) and a monitoring time (p9583/p9383). In addition, a delay
time (p9582/p9382) can be set. The brake ramp is effectively monitored once this delay time
expires.
If a Safety Integrated function is activated, e.g. SS1, then the system monitors whether the
actual value of the speed remains below the brake ramp during the complete braking
operation.
For p9506/p9306 = 3, the Safety functions without encoder correspond to the functions with
encoder, and SAM responds just the same as for "monitoring with encoder".