Siemens SINUMERIK 840D sl Function Manual page 585

Spindle functions using a PLC
It is possible to control special spindle motions via an axial PLC interface as an alternative to
FC18 and to start and stop them using VDI interface signals without executing a part
program.
This option is available only if the channel status is in "Interrupted" or "RESET" mode and
the program status is in "Interrupted" or "Aborted" mode. This acceptance state will occur in
case of RESET and in JOG mode.
A separate spindle start can be set for each spindle. The following spindle functions can be
controlled by PLC via interface signals:
• Spindle Stop (corresponds to M5)
• Spindle Start clockwise (corresponds to M3)
• Spindle Start counterclockwise" (corresponds to M4)
• Select gear stage
• Spindle positioning (corresponds to M19)
In the case of multichannel operation, the spindle started by the PLC becomes active in the
channel that is handling the spindle when the start command is received.
For more information about the special spindle interface, see:
References:
/FB1/ Function Manual, Basic Functions; Spindles (S1)
Autonomous singleaxis operations
It is possible to decouple a particular axis/spindle in the main run from the channel behavior
triggered by the NC program run.
The PLC identifies the corresponding axis/spindle from the axial VDI signal:
DB31, ... DBB28.7 (PLC is controlling the axis) = 1 → assume control
DB31, ... DBB28.7 (PLC is controlling the axis) = 0 → relinquish control
The following functions can be controlled from the PLC:
• Cancel axis/spindle sequence (equivalent to delete distancetogo)
• Stop or interrupt axis/spindle
• Resume axis/spindle operation (continue the motion sequence)
• Reset axis/spindle to the initial state
The exact functionality of independent singleaxis operations is described in:
References:
/FB2/ Function Manual, Basic Functions; Positioning Axes (P2)
For additional information on the channel-specific signal exchange (PLC → NCK), see:
Reference:
/FB1/ Function Manual, Basic Functions, Basic PLC Program (P3)
Basic logic functions: Mode group, channel, program operation, reset response (K1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Detailed description
2.3 Channel
27