Siemens SINUMERIK 840D sl Function Manual page 1088

NC/PLC Interface Signals (Z2)
Manual and handwheel travel
DB31, ...
DBB64
Bit 7, 6 Plus and minus traverse keys
Edge evaluation: no
The signal has the effect as described, if Bit 0 in the machine data:
MD17900 $MN_VDI_FUNCTION_MASK (setting for VDI signals)
is set to 0.
If bit 0 in the MD is set to 1, then the signal changes to 1 only if the axis is actually moving.
The interface signal
DB31, ... DBX64 Bit 5, 4 (traversing request plus/minus),
which is always output, has the same effect as signal travel command plus/minus when MD17900 bit 0 = 0.
Signal state 1 or A traverse movement of the axis is to be executed in one or the other direction.
edge change 0 → 1 Depending on the mode selected, the command is triggered in different ways:
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•
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Signal state 0 or A travel command in the relevant axis direction has not been given or a traverse movement has
edge change 1 → 0 been completed.
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Application To release clamping of axes with clamping (e.g. on a rotary table).
example(s)
Note:
If the clamping is not released until the travel command is given, these axes cannot be operated
under continuous path control!
Corresponding to .... DB31, ... DBX4.7 and/or DBX4.6 (traversing key plus and traversing key minus)
DB31, ... DBX64.5 and/or DBX.4 (Traversing request plus and minus)
1088
Signal(s) updated: Cyclically
JOG mode:
With the plus or minus traverse key.
REF mode:
With the traverse key that takes the axis to the reference point.
AUT/MDA mode:
A program block containing a coordinate value for the axis in question is executed.
JOG mode:
The travel command is reset depending on the current setting "jog or continuous mode" (DB31,
... DBX4.7 and/or DBX4.6).
While traversing with the handwheel.
REF mode:
When the reference point is reached.
AUT/MDA mode:
The program block has been executed (and the next block does not contain any coordinate
values for the axis in question).
Cancel by "RESET", etc.
DB21, ... DBX25.7 (axes disable) is active.
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions