Siemens SINAMICS S120 Function Manual page 168

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
● 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,
● The field Voltage tolerance acceleration (p9589) is used to suppress acceleration peaks.
An increase in this percentage value means that voltage peaks must have a greater
amplitude during acceleration to avoid influencing the actual value acquisition.
Note
Settings for reluctance motors
When operating a reluctance motor, the controller settings selected are usually more
dynamic. If in this case - for a factory setting of p9589 - the drive issues message C01711
with fault value 1043, then you can apply the following remedy:
• Increase p9589.
● Set the value of voltage tolerance acceleration (p9589) as follows:
– The diagnostics parameter r9784[0...1] shows the parameterized and the actual
– Record the following parameters with the trace function in the current controller cycle:
– Accelerate the motor, if possible until it reaches the rated speed.
– Check whether r9714[0] and r0063 match in the range 0 ... rated speed.
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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 asynchronous or reluctance 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.
Experience has shown that a value between 500 % and 1000 % provides robust
behavior in this case.
measured acceleration value. These values allow you to optimize what you enter into
p9589.
- r9784[0]: Target acceleration value
- r9784[1]: Actual acceleration value
- r9714[0]: load side actual velocity value on the Control Unit
- r0063: Actual speed value
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated