M1: Kinematic transformation   
6.5 Chained transformations 
  Extended Functions 
390  Function Manual, 03/2013, 6FC5397-1BP40-3BA1 
6.5.4  Persistent transformation 
Function 
A persistent transformation is always active and has a relative effect to the other explicitly 
selected transformations. Other selected transformation are computed as the first chained 
transformation in relation to the persistent transformation.  
Transformations such as 
TRANSMIT that must be selected in relation to the persistent 
transformation must be parameterized in a chain with the persistent transformation by means 
of 
TRACON. It is the first chained transformation rather than the TRACON  transformation which is 
programmed in the part program. 
For additional programming tips see 
References: 
Programming Manual, Job Planning; Transformations "Chained Transformation" 
Selection and deselection 
Persistent transformation is selected via the following machine data:  
MD20144 $MC_TRAFO_MODE_MASK, Bit 0 = 1 
MD20144 $MC_TRAFO_RESET_VALUE defines persistent transformation. 
MD20140 $MC_TRAFO_RESET_VALUE=Number of the transformation data set of the 
persistent transformation 
In addition the following must be set (i.e. noted): 
MD20110 $MC_RESET_MODE_MASK 
Bit 0 = 1 (Bit 7 is evaluated) 
Bit 7 =0 (MD20140 $MC_TRAFO_RESET_VALUE determines the transformation data set) 
MD20112 $MC_START_MODE_MASK (MD20140 $MC_TRAFO_RESET_VALUE) 
MD20118 $MC_GEOAX_CHANGE_RESET= TRUE (i.e. geometry axes are reset). 
If this additional data is not parameterized correctly, 
alarm 14404 is generated. 
With 
TRAFOOF the active TRACON is deselected and the persistent transformation is 
automatically selected.