Siemens SINUMERIK Series

H1: Manual and handwheel travel
3.9 Retraction in the tool direction (JOG retract)
Extended Functions
198 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
3.9.8 State diagram
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OM Operating mode
OMC Operating mode change
Figure 3-6 State diagram: JOG retract
3.9.9 System data
The following system data is available for JOG retract:
Meaning System variable $VA_ NC/PLC interface OPI variable
Retraction data available - DB21, ... DBX377.5 retractState, bit 0
JOG retract active - DB21, ... DBX377.4 retractState, bit 1
Retraction axis - - retractState, bits 2 - 3
Position restored, 1st measuring system $AA_POSRES DB31, ... DBX71.4 aaPosRes
Position restored, 2nd measuring system $AA_POSRES DB31, ... DBX71.5 aaPosRes
References
OPI and system variable
Lists Book 2 List Manual, Section "Variables".