Siemens SINUMERIK 840Di sl Commissioning Manual page 401

Rotary axis with absolute value encoder on motor
Figure 11-11 Rotary axis with absolute value encoder on motor
ADI4
For a machine axis whose measuring system consists of an absolute encoder on an ADI4
module, the following must be taken into consideration:
● Absolute encoder with SSI interface
● Encoder fine resolution
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Since the ADI4 transfers the data from the absolute encoder to the NC in EnDat format,
encoder type "Absolute encoder gen." must be entered as the encoder type:
– MD30240 $MA_ENC_TYPE (encoder type) = 4 (absolute encoder gen.)
References:
/ADI4/Analog drive port for 4 axes, Chapter "Function parameters (SINUMERIK 840Di
sl) and (SIMOTION)"
Encoder type
The fine resolution configured in the ADI4 (reserved bits for fine resolution) of the
absolute encoder must be assumed by the NC:
– MD30260 $MA_ABS_INC_RATIO[n] (encoder fine resolution)
References:
/ADI4/Analog drive port for 4 axes, Chapter "Function parameters (SINUMERIK 840Di
sl) and (SIMOTION)"
Reserved bits for fine resolution
NC Commissioning with HMI Advanced
11.5 Axes and spindles
401