Encoder-Limit-Frequency Monitoring - Siemens SINUMERIK 840D sl Function Manual

Monitoring functions in the NCK
● Encoder-limit-frequency monitoring
● Plausibility check for absolute encoders
3.2.5.1

Encoder-limit-frequency monitoring

Function
The NC encoder-limit-frequency monitoring is based on the configuration and telegram
information of the drive. It monitors that the encoder frequency does not exceed the configured
encoder limit frequency:
MD36300 $MA_ENC_FREQ_LIMIT (encoder limit frequency)
Encoder-limit-frequency monitoring always refers to the active measuring system selected in
the NC/PLC interface:
DB31, ... DBX1.5/1.6 (position measuring system 1/2)
Effectiveness
The encoder limit frequency is operative for:
● Linear axes
● Rotary axes
● Open-loop-controlled and position-controlled spindles
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
A3: Axis Monitoring, Protection Zones
3.2 Axis monitoring functions
97