6 Assi
nin
Parameters to the Control and the PLC Pro
ram
6
03.96
6.9 Axes and spindles
6-129
Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
Note
In order to guarantee that the control boots reliably, all activated axes are de-
clared as simulation axes (without hardware) during initialization.
MD 30130: CTRLOUT_TYPE = 0
MD 30240: ENC_TYPE = 0
When the axes are traversed, the control loop is simulated and no hardware-
specific alarms are output. For the purpose of axis or spindle start-up, the value
“1”, or the value corresponding to the hardware identifier, must be entered in
this MD.
The user can select in MD 30350: SIMU_AX_VDI_OUTPUT whether the inter-
face signals of a simulation axis are output at the PLC interface (e.g. during
program test, if there is no drive hardware).
The measuring system which is active for the position control is selected via
interface signals.
IS “Position measuring system 1 selected” (DB31, DBX1.5)
IS “Position measuring system 2 selected” (DB31, DBX1.6)
If both signals are set, then the position measuring system 1 is active.
References: /FB/, A2, “Various Interface Signals”
6.9.9 Velocity matching (axis)
The following machine data must be defined:
MD 32000: MAX_AX_VELO (maximum axis velocity)
MD 32010: JOG_VELO_RAPID (conventional rapid traverse)
MD 32020: JOG_VELO (conventional axis velocity)
MD 34020: REFP_VELO_SEARCH_CAM (reference point approach
velocity)
MD 34040: REFP_VELO_SEARCH_MARKER [n] (creep velocity)
MD 34070: REFP_VELO_POS (reference point approach velocity)
Note
When new velocity/speed values are entered, the velocity/speed monitor
(MD 36200: AX_VELO_LIMIT) must be matched accordingly.
The motor speed for the axis drives which results in velocity MAX_AX_VELO
(MD 32000) must be entered in MD 1401.
In order to ensure correct setpoint scaling, it is essential to enter the correct load
gearbox data!
MD 31060: DRIVE_AX_RATIO_NUMERA
MD 31050: DRIVE_AX_RATIO_DENOM
Interface signals
for measuring
system switchover
Machine data for
velocity matching
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