Siemens SINUMERIK 840D sl Function Manual page 166

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
2.7 Axis container
Exceptions to this rule are synchronized actions M3, M4, M5 and a motion-changing S
function: If an axis container rotation is active and the spindle is transferred to the control of
another NCU, alarm 20142 (channel %1 command axis %2: Invalid axis type) is output.
These synchronized actions do not change a channel axis into a command axis, but leave it
in its original state. Synchronized actions of this type cannot be stored.
References: /FBSY/ Function Manual, Synchronized Actions
Reciprocating axes
A container axis in a container enabled for rotation cannot become a reciprocating axis, i.e.
this change in status does not take place until the axis container has finished rotating. The
status change command remains active.
Axis couplings
An axis container cannot rotate while an axis coupling in which one of its container axes is
involved is still active. The coupling must be deselected (COUPOF) prior to axis container
rotation and selected again (COUPON) afterwards. A new COUPDEF command is not
necessary.
Main run offset values
The main run offset values (DRF offset, online tool offset, synchronized action offset,
compile cycle offset) for a channel axis assigned to a container slot remain valid after the
relevant axis container has rotated. External zero offsets cannot remain valid after an axis
container rotation as these refer to specific machine axes. If an external zero offset is active,
the axis container rotation is rejected with alarm 4022.
Axial frame
The axial frame of a channel axis, which is also a container axis, is no longer valid after an
axis container rotation. Since the axis container rotation assigns a new machine axis to the
channel axis, but the axial frame is referred to a machine axis, the rotation thus also changes
the axial frame. If the two frames do not coincide, a synchronization process (internal
REORG) is performed.
The assignment between a channel axis and a machine axis is altered by the axis container
rotation. The current frames remain unchanged after a rotation. The user himself is
responsible for ensuring that the correct frames are selected after a rotation by programming
basic frame masks, for example.
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Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions