Supplementary Conditions   
3.1 Large traverse range 
  Reference Point Approach (R1) 
3-2  Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0 
Supplementary conditions 
•  Linear axes with a traversing range greater than 4,096 encoder revolutions, an EQN 1325 
rotary absolute encoder, and an assigned absolute encoder range of: 
MD34220 $MA_ENC_ABS_TURNS_MODULO = 4096: 
– The maximum possible travel range corresponds to that of incremental encoders. 
•  Endlessly turning rotary axes with absolute encoders: 
– Any number of integer transmission ratios are permitted. 
– We recommend that you parameterize endlessly turning rotary axes with absolute 
  encoders as modulo rotary axes (traversing range 0 to 360 degrees). 
MD34220 $MA_ENC_ABS_TURNS_MODULO 
Otherwise, the machine axis may require a very long traverse path to reach absolute 
zero when the measuring system is activated. 
•  Machine axes with absolute encoders: 
– To ensure that the NC correctly determines the current actual position when the 
  measuring system is reactivated, the machine manufacturer/user must ensure that the 
  machine axis is moved less than half the assigned traversing range when the 
  measuring system is deactivated (POWER OFF, "Parking" selected). 
MD34220 $MA_ENC_ABS_TURNS_MODULO