Siemens SINUMERIK 840D sl Function Manual page 2041

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.
Application If the position control is active the axis/spindle is kept in position by the position controller.
example(s) Any brakes or clamps can thus be opened.
The interface signal:
DB31, ... DBX61.5 (position controller active)
can be used as feedback signal for the interface signal:
DB31, ... DBX2.1 (controller enable).
The holding brake of a vertical axis must be activated as soon as the position control is no longer
active.
If a spindle has been technically designed/dimensioned for the purpose, in the part program, it can
be changed-over into the closed-loop position controlled mode as spindle or as axis (withSPCON or
M70).
In these cases, the interface signal "position controller active" is set.
Special cases, Special case for simulation axes (MD30350 $MA_SIMU_AX_VDI_OUTPUT = "1"):
errors, .... The IS "position controller active" is also set for simulation axes as soon as MD = "1".
Corresponding to .... DB31, ... DBX2.1 (controller enable)
DB31, ... DBX1.4 (follow-up mode)
DB31, ... DBX1.5 and 1.6 (position measuring system 1 and 2)
Additional references /DA/ Diagnostics Guide
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Signal(s) updated: cyclic
2.1 Various interface signals and functions (A2)
Detailed Description
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