Siemens Sinamics S120 Function Manual page 155

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
enc oderless (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. Deduct from the trace
– 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
● Using parameter Fault tolerance actual value acquisition encoderless (p9585), you can
set the tolerance of the plausibility monitoring of current and voltage angle.
– For synchronous motors, p9585 = 4 must be parameterized.
– Reducing this value can have a negative impact on the actual value acquisition and
– Increasing the value results in a longer evaluation delay.
– For devices in the chassis format, Safety Integrated without encoder can be used with
– For the factory setting (= -1), for synchronous motors, the calculation automatically
– The diagnostics parameter r9786[0...2] shows you the values of the plausibility angle,
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
drive system (with motor and the intended load). The STARTER 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
recording the time after which the peak current of the asynchronous 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.
the plausibility check.
induction motors up to a maximum of 1000 kW: For very large motors, it may be
necessary to increase the value in parameter p9585. For chassis format devices,
parameter p9585 is preassigned a value of "2".
uses the value 4, for induction motors, the value 0.
voltage angle and current angle currently measured by the converter. These values
allow you to optimize what you enter into p9585.
Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
is reached. Enter the time
rated
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