Siemens SINUMERIK 840Di Function Manual page 28

Detailed Description
2.1 NC/PLC interface signals
DB31, ... DBX9.0 / 9.1 / 9.2 (controller parameter set selection)
The PLC user program sends a binary code request via the "controller parameter set
selection" to activate the corresponding parameter set with that of the NC.
DBX9.2
0
0
0
0
1
1
1
1
The parameter set change must be enabled (not required for spindles):
MD35590 $MA_PARAMSET_CHANGE_ENABLE = 1 or 2
For detailed information about parameter-set changeover, please refer to:
References:
/FB/ Description of Functions, Basic Machine; Spindles (S1)
Chapter: Spindle Operating modes > Axis Mode;
Chapter: Programmable Gears > Gear Stages for Spindles and Gear Change
Parameter-set changeover when the machine axis is in motion
The response to a parameter-set changeover is determined by the consequential change in
the closed-loop control circuit gain factor Kv:
MD32200 $MA_POSCTRL_GAIN (KV factor)
• "Identical servo gain factors" or "position control not active":
• "Non-identical servo gain factors" or "position control active":
Parameter-set changeover from part program
For parameter-set changeover from the part program, the user (machine manufacturer) must
define and evaluate in the PLC user program corresponding user-specific auxiliary functions.
The PLC user program will then set the changeover request on the corresponding parameter
set.
For detailed information about auxiliary function output, please refer to:
References:
/FB/ Description of Functions, Basic Machine, Auxiliary Function Output (H2)
2-16
DBX9.1
0
0
1
1
0
0
1
1
The NC responds immediately to the parameter-set changeover. The parameter set is
also changed during the movement.
To ensure a relatively jerk-free changeover, the parameter set changeover does not take
place until the axis is "stopped", i.e., the assigned standstill velocity has been reached or
exceeded:
DB31, ... DBX61.4 = 1 (axis/spindle has stopped)
MD36060 $MA_STANDSTILL_VELO_TOL
DBX9 Parameter-set number
0 1
1 2
0 3
1 4
0 5
1 6
0 6
1 6
Various NC/PLC Interface Signals and Functions (A2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0