Siemens SINUMERIK MC Commissioning Manual page 262

Commissioning and configuring
6.5 Configuring NC and drive-specific safety settings
Setting
Fault tolerance
Speed tolerance
262
Meaning
Setting of the plausibility monitoring tolerance for the current and the volt‐
age angle.
A higher value makes the drive more stable when it is reversing at low
speeds - or when the load changes abruptly in the field-weakening range.
An increase brings advantages when the current or voltage at the motor
becomes small.
Increasing the value results in a longer evaluation delay - and to a higher
speed tolerance (see below).
Notice: Reducing this value can have a negative impact on the actual value
acquisition and the plausibility check.
For synchronous motors, the value must be set to 4.
For value = -1:
- for synchronous motors, the calculation automatically uses a value of 4
- for induction motors, the calculation automatically uses a value of 0 (if the
code number of the power unit p0201[0] is < 14000, otherwise a value of
2 is used).
Dependencies: F01681, C01711
Displays the actual speed deviation for encoderless actual value acquisi‐
tion.
This value is calculated when setting the error tolerance (see above).
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB