Influence On Synchronous Operation Via Plc Interface - Siemens SINUMERIK 840D sl Function Manual

Supplementary condition
NST DB31, ... DBX31.4 (resynchronization) only has any effect if there is a defined offset
position between the following spindle and leading spindle.
This is the case following COUPON with offset positions such as COUPON(...,77) or SPOS,
SPOSA, M19 for the following spindle with a closed coupling..
14.4.3

Influence on synchronous operation via PLC interface

PLC interface signals
In synchronous operation, the influence of the PLC on the coupling resulting from the setting
of LS and FS interface signals must be noted.
The effect of the main PLC interface signals on the synchronous spindle coupling is
described below.
Spindle override (DB31, ... DBB19)
The spindle override value specified by the PLC in synchronous operation is only applied to
the leading spindle.
Axis/spindle disable (DB31, ... DBX1.3)
The behavior of the axes involved can be found in the following table:
set: 1, disabled: 0
No.
1
2
3
4
5
6
7
8
● This signal is no longer effective when the coupling for FS/FA is activated. → No. 6
● If the signal for the LS/LA is set, it also applies to the FS/FA(s) → No. 7
● A workpiece clamped between two spindles (workpiece transfer from front to rear-side
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
LS/LA FS/FA Coupling
0 0 OFF
0 1 OFF
1 0 OFF
1 1 OFF
0 0 ON
0 1 ON
1 0 ON
1 1 ON
machining) cannot be destroyed.
14.4 Special features of synchronous mode
Response
Setpoints of axes are output
No setpoint output for FS/FA
No setpoint output for LS/LA
No setpoint output for LS/LA and FS/FA
Setpoints of axes are output
Disable not effective for FS/FA
Disable also effective for FS/FA, no setpoint output
No setpoint output for LS/LA and FS/FA
S3: Synchronous spindle
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