Siemens SINUMERIK Series Function Manual

S3: Synchronous spindle
13.1 Brief description
Extended Functions
716 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
13.1.6 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 using the axial signal IS
"Disable synchronization" (DB31, ... DBX31.5).
When the main run advances to a block containing part program instruction
COUPON (FS, LS,
offset), the following interface signal is evaluated for the following spindle:
IS "Disable synchronization" (DB31, ... DBX31.5).
● For IS "Disable synchronization" (DB31, ... DBX31.5) = 0, the position offset is traversed
through as before.
● For IS "Disable synchronization" (DB31, ... DBX31.5) = 1, only the continuous velocity
synchronism is established. The following spindle does not execute any additional
movement.
The coupling then responds analogously to a programmed
COUPON(<FS>,<LS>).
Special features
For the IS "Disable synchronization" (DB31, ... DBX31.5) offset motion of the following
spindle cannot be controlled that was generated as follows:
● SPOS, POS
● Synchronized actions
● FC18 (for 840D sl)
● 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.

Siemens SINUMERIK Series Specifications

General

Axes Control	Up to 31 axes
Category	Control Unit
Manufacturer	Siemens
Series	SINUMERIK
Control Type	CNC
Communication Interfaces	Ethernet, USB
Operating Temperature	0°C to 45°C
Protection Class	IP20
Power Supply	24V DC
Display	Color TFT LCD