Siemens SINUMERIK 840D sl Function Manual page 1034

NC/PLC interface signals (Z2)
19.4 Manual and handwheel travel
DB21, ...
DBB40, 46, 52
Bit 7, 6 Plus and minus travel commands (for geometry 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 40, 46, 52 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:
•
•
•
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.
•
•
•
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 .... DB21, ... DBX12.7 and/or DBX12.6 ff
(Traverse key plus and traverse key minus for geometry axis)
DB21, ... DBX 40, 46, 52 Bit 5 (Traversing request plus/minus)
DB21, ...
DBB41, 47, 53 Active machine function for geometry axis (1, 2, 3)
Bit 0-6 INC1, ..., continuous
Edge evaluation: No
Signal state 1 or The PLC interface receives a signal stating which JOG mode machine function is active for the
edge change 0 → 1 geometry axes.
The reaction to actuation of the traverse key or rotation of the handwheel varies, depending on
which machine function is active.
Signal state 0 or The machine function in question is not active.
edge change 1 → 0
Corresponding to .... DB21, ... DBB13 ff (machine function INC1, ..., continuously for geometry axis)
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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.
NST DB21, ... DBX25.7 (axes disable) is active.
Signal(s) updated: Cyclically
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions