Siemens SINUMERIK 808D Parameter Manual page 438

Detailed descriptions of interface signals
5.8 Axis / spindle-specific signals
Signal state 1
Signal state 0
corresponding to ...
Note for the reader
DB380x
DBX1000.1 and .0
Edge evaluation: No
Signal state 1
Signal state 0
corresponding to ...
Note for the reader
DB380x
DBX1000.3 or .2
Edge evaluation: No
438
This input range is only used if IS "INC inputs active in the mode group area"
(DB2600 DBX1.0) is not set.
IS "INC... is used to define how many increments the machine axis traverses
when the traversing key is pressed or the handwheel is turned one detent
position. In this case, the JOG mode must be active.
For "var. INC", the value in SD41010 JOG_VAR_INCR_SIZE is generally
valid.
For "continuous", the associated axis can be traversed using either the plus
or minus traversing key by keeping the key pressed.
As soon as the selected machine function becomes active, this is signaled
at the PLC interface (IS "Active machine function 1 INC..." ).
If several machine function signals (1 INC, INC... or "Continuous traversing")
are selected at the interface simultaneously, then no machine function is
activated by the control.
Note:
The input IS "INC..." or "continuous" to change an active machine function
must be present for at least one PLC cycle. A steady-state signal is not
required.
The machine function in question is not selected. No request is made to
change an active machine function.
If an axis is currently traversing an increment, this movement is also aborted
if this machine function is deselected or switched over.
IS "Active machine function 1 INC, ..." (DB390x DBX5.0 ... .6)
IS "INC inputs active in the mode group area" (DB2600 DBX1.0)
Function Manual Basic Functions H1
Hardware limit switches plus and minus
Signal(s) to axis / spindle (PLC → NCK)
Signal(s) updated: Cyclic
A switch can be mounted at each end of the travel range of a machine axis
which will cause a signal "hardware limit switch plus or minus" to be signaled
to the NC via the PLC if it is actuated.
If the signal is recognized as set, alarm 021614 "Hardware limit switch plus
or minus" is output and the axis is immediately braked. The braking type is
defined using MD 36600: BRAKE_MODE_CHOICE (braking behavior with
hardware limit switch).
Normal condition - a hardware limit switch has not responded.
MD36600 BRAKE_MODE_CHOICE (braking behavior for the hardware limit
switch)
Function Manual Basic Functions A3
2. software limit switch plus or minus
Signal(s) to axis / spindle (PLC → NCK)
Signal(s) updated: Cyclic
Parameter Manual
List Manual, 01/2017