Notes Regarding Setting Parameters For Safe Actual Value Sensing Without Encoder - Siemens SINAMICS S120 Function Manual

4.2.15.2

Notes regarding setting parameters for safe actual value sensing without encoder

Parameters p9585, p9586, p9588 and p9589 are available to guarantee safe motion
monitoring for Safety Extended Functions without encoder depending on the situation in your
specific application. In most cases, you can work with the default values.
● If, during the start phase, the actual value acquisition is still not operating correctly, the
converter outputs messages; however these still do not represent any safety problems. In
order to avoid this, increase this value of parameter Delay time of the evaluation
encoderless (p9586). In this way, you determine the "Evaluation delay time without
encoder" (p9586):
– To determine the minimum delay time of p9586, record the starting behavior of the
– In order to avoid fault responses, deselect the "SDI without encoder" and "SLS without
– Activate the trace function using the "OFF2 → inactive" trigger, and the following as the
– Perform application-specific startup characteristics for the drive. Establish from the
– Enter the measured time + approx. 10 % into p9586.
– Activate the "SDI without encoder" and "SLS without encoder" functions. Restart the
– Alternatively, you can change the value of p9586 in small steps and then monitor the
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
drive system (with motor and the intended load). The trace function allows the value
for p9586 to be determined.
encoder" functions.
signals to be recorded: At least one motor current phase and OFF2. After the ON
command, record this motor phase current until I
required to reach I (+ 10% reserve) in p9586.
min
trace recording the time after which the peak current of the induction or reluctance
motor or the pulse pattern of the rotor position identification finishes, and the current of
p9588 which exceeds the "Minimum current actual value acquisition without encoder".
machine, and keep the trace function activated.
Now it is no longer permissible that messages are output.
system response. You have found a suitable value if unnecessary messages/signals
no longer occur.
Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
is reached. Enter the time
rated
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