Siemens SINUMERIK 840Di Function Manual page 1907

DB31, ...
DBX61.3 Follow-up mode active
Corresponding to .... DB31, ... DBX2.1 (controller enable)
DB31, ... DBX1.4 (follow-up mode!)
Additional references /DA/ Diagnostics Guide
DB31, ...
DBX61.4 Axis/spindle stationary
Edge evaluation: no
Signal state 1 or The actual velocity of the axis or the actual speed of the spindle is below the limit defined in
edge change machine data:
0 → 1 MD36060 $MA_STANDSTILL_VELO_TOL
(maximum velocity/speed for signal "Axis/Spindle stationary").
Signal state 0 or The actual velocity of the axis or the actual spindle speed is greater than the value specified in the
edge change MD (standstill/zero speed range).
1 → 0
If a travel command is present, e.g. for a spindle, then the signal is always = 0 - even if the actual
speed lies below that specified in MD36060.
If the interface signal:
DB31, ... DBX61.4 (axis/spindle stationary)
is signaled and there is no closed-loop position control active for the spindle, then at the MMC, an
actual speed of zero is displayed and with the system variable $AA_S[n] zero is read.
Application Enable signal for opening a protective device (e.g. open door).
example(s)
The workpiece chuck or the tool clamping device is only opened when the spindle is stationary.
The oscillation mode can be switched-in during gear stage change after the spindle has been
braked down to standstill.
The tool clamping device must have been closed before the spindle can be accelerated.
Corresponding to .... MD36060 $MA_STANDSTILL_VELO_TOL
(maximum velocity/speed for signal "Axis/spindle stationary")
DB31, ...
DBX61.5 Position controller active
Edge evaluation: no
Signal state 1 or The control signals that the position controller for the axis or spindle is closed.
edge change
0 → 1
Signal state 0 or The control signals that the position controller for the axis or spindle is open.
edge change
If "controller enable" is canceled because of a fault or from the PLC user program the position
1 → 0
controller is opened and therefore the interface signal
DB31, ... DBX61.5 (position controller active)
is set to 0.
Spindle without position control: Signal "Position controller active" is always "0".
See References for other effects.
NC/PLC Interface Signals (Z1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Signal(s) updated: cyclic
Signal(s) updated: cyclic
2.1 Various interface signals and functions (A2)
Detailed Description
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