Siemens SINUMERIK 840D sl Function Manual page 37

Axis-specific override
The axial feedrate can be changed via the axis-specific system variable $AA_OVR:
Data type:
Unit:
Range of val‐
ues:
The system variable $AA_OVR must be written in every interpolator clock cycle, otherwise the
value "100%" is effective.
PLC override
Channel-specific override
The channel-specific override (DB21, ... DBB4) set via the machine control panel can be read
via the channel-specific system variable $AC_PLC_OVR:
Data type:
Unit:
Range of val‐
ues:
Axis-specific override
The axis-specific override (DB31, ... DBB0) set via the machine control panel can be read via
the axis-specific system variable $AA_PLC_OVR:
Data type:
Unit:
Range of val‐
ues:
Effective override
Effective channel-specific override
The effective channel-specific override can be read via the channel-specific system variable
$AC_TOTAL_OVR:
Data type:
Unit:
Range of val‐
ues:
Synchronized actions
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
REAL
%
0.0 to machine data
● For binary-coded override switch
MD12100 $MN_OVR_FACTOR_LIMIT_BIN
● For gray-coded override switch
MD12030 $MN_OVR_FACTOR_FEEDRATE[30]
REAL
%
0.0 to maximum value
REAL
%
0.0 to maximum value
REAL
%
0.0 to maximum value
3.3 System variables for synchronized actions
Detailed description
37