Siemens SINUMERIK 840D sl Function Manual page 941

DB31, ...
DBX98.2
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Special cases, errors, ....
Corresponding to ....
DB31, ...
DBX98.4
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Corresponding to ....
DB31, ...
DBX99.0
Edge evaluation: No
Signal state 1 or edge
change 0 → 1
Signal state 0 or edge
change 1 → 0
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Actual value coupling
Signal(s) updated: Cyclic
The actual-value coupling is active as the coupling type between the leading and following
spindles (see MD21310).
Note:
The signal is relevant only for the active following spindle in synchronous operation.
The setpoint coupling is active as the coupling type between the leading and following spindles
(see MD21310).
In the case of faults/disturbances on the following spindle which result in cancellation of the FS
"servo enable", the coupling relationship between the FS and LS is reversed and switched over
to an actual-value coupling internally in the control under certain circumstances.
DB31, ... DBX84.4 (Synchronous mode)
MD21310 $MC_COUPLING_MODE_1 (coupling type in synchr. spindle oper.)
Overlaid motion
Signal(s) updated: Cyclic
The following spindle traverses an additional motional component which is overlaid on the
motion from the coupling with the leading spindle.
Examples of overlaid movement of FS:
- Activation of synchronous operation with defined angular offset between FS and LS
- Activation of synchronous operation with LS in rotation
- Alteration of transmission ratio when synchronous operation is selected
- Input of a new defined angular offset when synchronous operation is selected
- Traversal of FS with plus or minus traversing keys or handwheel in JOG when synchronous
operation is selected
As soon as the FS executes an overlaid movement, IS "Fine synchronism" or IS "Coarse syn‐
chronism" (depending on threshold value) may be canceled immediately.
Note:
The signal is relevant only for the following spindle in synchronous operation.
The following spindle does not traverse any additional motional component or this motion has
been terminated.
DB31, ... DBX84.4 (Synchronous mode)
LS (leading spindle) active
Signal(s) updated: Cyclic
The machine axis is currently active as the leading spindle.
Note:
The signal is relevant only in synchronous operation.
The machine axis is not currently active as the leading spindle.
Z2: NC/PLC interface signals
19.13 Synchronous Spindles (S3)
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