Siemens SINUMERIK 840D sl Function Manual page 1049

DB21, ...
DBB332, 336, 340
Bit 5, 4 Plus and minus traversing request (for orientation axis)
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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•
•
Corresponding to .... DB31, ... DBX332.7 or DBX332.6
DB31, ... DBX336.7 or DBX336.6
DB31, ... DBX340.7 and/or DBX340.6 (traversing command plus and traversing command minus)
DB21, ...
DBB332, 336, 340
Bit 7, 6 Plus and minus travel command (for orientation axis)
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
DB21, ... DBX 332, 336, 340 Bit 5, 4 (traversing request plus/minus),
which is always output, has the same effect as signal travel command plus/mins 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. Depending on the
edge change 0 → 1 mode selected, the command is triggered in different ways:
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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.
•
•
•
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
JOG mode:
The travel command is reset depending on the current setting "jog or continuous mode" (see
DBX12.7 and DBX12.6 ff.
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.
interface signal DB21, ... DBX25.7 (axis disabled) is active.
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" (see
DB21, ... DBX12.7 or DBX12.6 ff).
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.
interface signal DB21, ... DBX25.7 (axes disable) is active.
Z2: NC/PLC interface signals
19.4 Manual and handwheel travel
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