Signals From Axis/Spindle - Siemens SINUMERIK 840D sl Function Manual

A2: Various NC/PLC interface signals and functions
2.2 NC/PLC interface signals - only 840D sl
Parameter set changeover must be enabled via the machine data (not required for spindles):
MD35590 $MA_PARAMSET_CHANGE_ENABLE = 1 or 2
For detailed information on the parameter set changeover, see Section "Parameter set
selection during gear step change (Page 1246)".
Parameter set changeover when machine axis is in motion
The response to a parameter set changeover depends on the consequential change in the
closed-loop control circuit gain factor K
MD32200 $MA_POSCTRL_GAIN (servo gain factor)
● "Identical servo gain factors (K
The NC responds immediately to the parameter set changeover. The parameter set is also
changed during the motion.
● "Unequal servo gain factors (K
In order to effect a changeover as smoothly as possible, changeover is not activated until
the axis "is stationary", i.e. once the parameterized zero speed has been reached or
undershot:
DB31, ... DBX61.4 = 1 (axis/spindle stationary)
MD36060 $MA_STANDSTILL_VELO_TOL (threshold velocity/speed "axis/spindle
stationary")
Parameter set changeover from the part program
For parameter set changeover from the part program, the user (machine manufacturer) must
define corresponding user-specific auxiliary functions and evaluate them in the PLC user
program. The PLC user program will then set the changeover request on the corresponding
parameter set.
For detailed information on the auxiliary function output, see Section "H2: Auxiliary function
outputs to PLC (Page 377)".
DB31, ... DBX9.3 (parameter set specification disabled by NC)
If the interface signal is set, a request for a parameter set changeover (DB31, ... DBX9.0 / 9.1 /
9.2) is ignored.
2.2.7

Signals from axis/spindle

DB31, ... DBX61.0 (drive test travel request)
If machine axes are traversed by special test functions such as "function generator", an explicit
drive-test-specific enable is requested for the movement:
48
Controller parameter set
5
6
7
8
DBX9.2
1
1
1
1
:
V
)" or "position control not active":
V
)" or "position control not active":
V
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
DBX9.1 DBX9.0
0 0
0 1
1 0
1 1
Basic Functions