Requirements; Synchronous Mode - Siemens SINUMERIK 840D sl Function Manual

14.1.2

Requirements

The "Synchronous spindle/polygonal turning" option or the corresponding optional generic
coupling version is needed to use the function.
Information on the different versions of the generic coupling can be found in:
References :
/FB3/ Function Manual, Special Functions; Coupled Axes and ESR (M3),
Brief description of the generic coupling, "Requirements"
14.1.3

Synchronous mode

Description
<axial expression>:
<Axis identifier>:
<Spindle identifier>:
<Spindle number>:
(FS, LS, offset):
$P_COUP_OFFS[Sn]
Synchronous spindle pair
Synchronous operation involves a following spindle (FS) and a leading spindle (LS), referred
to as the synchronous spindle pair. The following spindle imitates the movements of the
leading spindle when a coupling is active (synchronous operation) in accordance with the
defined functional interrelationship.
Synchronous mode
Synchronous mode (also referred to as "Synchronous spindle operation") is another spindle
operating mode. Before synchronous mode is activated, the following (slave) spindle must
have been switched to position control. Synchronous operation is activated for the following
spindle when the coupling is activated. As soon as the coupling is deactivated, the following
spindle switches to back to open-loop control mode.
As soon as synchronous operation is active for the following spindle, the following interface
signal is reported to the PLC:
NST "Synchronous operation" (DB31, ... DBX84.4) = 1.
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
can be:
- Axis identifier
- Spindle identifier
C (if spindle has the identifier "C" in axis operation.)
Sn, SPI(n) where n = spindle number
1, 2, ... according to the spindle number defined in MD35000
$MA_SPIND_ASSIGN_TO_MACHAX
LS = Leading Spindle, FS = Following Spindle,Offset = read
programmable offset of following spindle using system variables
Programmed position offset of the synchronous spindle
Synchronous Spindles (S3)
14.1 Brief description
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