Siemens SINAMICS S120 - Encoder Dirty Signal

Basic functions
7.19 Encoder diagnostics
Drive functions
370 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
7.19.2
Encoder dirty signal
Some encoders have an additional output, which switches from "high" to "low", if the
evaluation electronics in the encoder can no longer determine a reliable position.
In order to inform you about this, the drive only outputs alarm A3x470
1)
when an SMC30 is
used.
1)
x = encoder number (x = 1, 2 or 3)
Commissioning
Connect the corresponding encoder signal with the CTRL input (monitoring signal) of the
device (terminal X521:7). Parameterization is not required.
Note
The input is automatically set to a high lev
el if a wire is broken: As a consequence, for a
broken wire, the encoder is considered to be "good".
Overview of important parameters (see SINAMICS S120/S150 List Manual)
•
p0437[0...n]
Sensor Module extended configuration