Freezing The Speed Raw Value; Adjustable Hardware Filter - Siemens SINAMICS S120 Function Manual

Hide thumbs Also See for SINAMICS S120:

Table of Contents

Freezing the speed raw value

If, for high speed changes, the dn/dt monitoring function responds, then the function extension

"freeze speed raw value" gives you the opportunity of briefly specifying the actual speed value

therefore equalizing the speed change.

Commissioning the function

Set parameter p0437.6 = 1 to activate the function.

If the function is activated, then the following responses are executed:

1. If the dn/dt monitor responds, the alarm A3x418 " Encoder x: Speed difference per sampling

rate exceeded"

2. A frozen actual speed value limited to just two current controller cycles is supplied.

3. The rotor position continues to integrate.

4. The actual value is released again after 2 current controller cycles.

x = encoder number (x = 1, 2 or 3)

The function extension "Adjustable hardware filter" allows an encoder signal to be filtered,

therefore suppressing short interference pulses.

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Basic functions

8.21 Tolerant encoder monitoring