Siemens SINUMERIK 840D sl Function Manual page 877

Coupling options
Synchronous spindle couplings can be defined as both
● permanently configured via channel-specific machine data
● freely defined using language instructions (COUP...) in the parts program
The following variants are possible:
1. A fixed configuration for a coupling can be programmed via machine data. In addition, a
2. No coupling is configured via machine data. In this case, the couplings can be user-
Separate following spindle interpolator
The separate following spindle interpolator allows a number of following spindles from
different channels or from another NCU to be coupled as defined by the user to a single
leading spindle. The following spindle interpolator is
● COUPON or COUPONC activated and
● COUPOF or COUPOFS deactivated
and is always located in the channel in which the COUPON, COUPONC statement has been
programmed for the following spindle. If the following spindle to be activated was previously
programmed in another channel, COUPON/COUPONC initiates an axis replacement and
fetches the spindle into its own channel.
Certain synchronous spindle functions can be controlled from the PLC by means of coupling-
specific axial VDI interface signals. The latter act exclusively on the slave spindles and do
not affect the leading spindle. For more information on this, see "Controlling synchronous
spindle coupling via PLC".
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
(hereinafter referred to as "permanent coupling configuration") as well as
(hereafter referred to as "user defined coupling")
second coupling can be freely defined via the parts program.
defined and parameterized via the parts program.
S3: Synchronous spindle
14.1 Brief description
877