Siemens SINAMICS S120 Function Manual page 96

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
Inadmissible operating modes for Safety Integrated Functions "without encoder"
● No operation with SINAMICS Hydraulic Drive (HLA)
● Current controller clock cycles 31.25 µs and 62.5 μs (for Double Motor Modules with two
configured safety drives) are not permissible.
● For the independent setting of current controller clock cycle and pulse frequency in
conjunction with Safety Integrated "without encoder", the following system clock cycles
are not permitted:
– Double Motor Module: < 125 μs
– All other components: < 62.5 μs
– p9589 must be set = 3300 to allow the current controller clock cycle and pulse
● For all designs: Safety Integrated Functions "without encoder" only with parameter p1810
= factory setting, this includes:
- No wobbling
- No fine setting of the pulse frequency
● For chassis format devices, the following also applies:
– For chassis format devices, operation without encoder is only permissible for induction
– No operation involving parallel connections
– Optimized pulse patterns cannot be selected for SIMOTICS FD
● No "shaft generator" functionality
● Induction motors up to 1000 kW
On very large machines, it may also be necessary to adjust the parameter p9585.
Critical operating modes for Safety Integrated Functions "without encoder"
When the safety functions are deactivated, the following technology functions are not
negatively influenced.
Using the following operating modes with the Safety Integrated Functions activated without
encoder can result in errors in the encoderless safe actual value sensing (see messages
C01711, C30711 with fault values 1040 ff.).
Safe, encoderless actual value sensing is based on the measurement of current and voltage
variables, which can influence the following functions. This does not result in unsafe states.
However, this fault can be expected to have a negative impact on availability.
Note
Irregular operating states
Note that in irregular operating states (e.g. "stalled motor"), the converter can fail with safety
faults. However, under no circumstances is an unsafe state reached.
94
frequency to be independently set.
motors, however not for synchronous motors.
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated