Controlling Synchronous Spindle Coupling Via Plc - Siemens SINUMERIK 840D sl Function Manual

Synchronous Spindles (S3)
14.1 Brief description
14.1.7

Controlling synchronous spindle coupling via PLC

Controlling following spindle via PLC
Using the coupling-specific, axial VDI interface signals, it is possible to control
synchronization motions for the following spindle from the PLC program. This offers the
option of utilizing the PLC to disable, suppress or restore a synchronization motion for the
following spindle specified by offset programming.
These signals have no effect on the leading spindle. The following coupling-specific VDI
signal (PLC → NCK) is available:
IS "Disable synchronization" (DB31, ... DBX31.5
"Disable synchronization"
The synchronization motion for the following spindle is suppressed by the PLC via axial
IS "Disable synchronization" (DB31, ... DBX31.5).
When the main run advances to a block containing parts program statement COUPON (FS,
LS, offset), the following interface signal is evaluated for the following spindle:
IS "Disable synchronization" (DB31, ... DBX31.5).
● When IS "Disable synchronization" (DB31, ... DBX31.5) = 0, the position offset is applied
● When IS "Disable synchronization" (DB31, ... DBX31.5) = 1 only continuous speed
Special points to be noted
IS "Disable synchronization" (DB31, ... DBX31.5) can be used to no control offset
movements of the following spindle which were created as follows:
● SPOS, POS
● Synchronized actions
● FC18
● JOG
These functions are controlled by VDI signal IS "Feedrate stop/Spindle stop" (DB31, ...
DBX4.3).
Synchronized state reached
Whenever a state of synchronism has been reached, the following two VDI signals are set
regardless of whether synchronization has been disabled or not:
IS "Synchronism coarse" (DB31, ... DBX98.1) and
IS "Synchronism fine" (DB31, ... DBX98.0)
Further block changes after COUPON are not prevented by suppression of synchronization.
874
as before.
synchronism is established. The following spindle does not execute any additional
movement.
The coupling then responds analogously to a programmed COUPON (FS, LS).
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions