Name Of A Link Axis; Parameterization - Siemens SINUMERIK 840D sl Function Manual

B3: Distributed systems - 840D sl only
3.2 NCU link
3.2.3.2

Name of a link axis

The name of a link axis is composed of the identifier for the home NCU on which the machine
axis is physically connected and the general machine axis name AXn:
NC<ID>_<axis>
<ID>:
<axis>:
3.2.3.3

Parameterization

Assignment: Geometry axis or special axis to link axis
Direct assignment
A geometry or special axis can be assigned directly to a link axis in the logical machine axis
image by specification of the link axis name:
MD10002 $MA_AXCONF_LOGIC_MACHAX_TAB[ <axis>] = <link axis>
Parameters
<axis>:
<link axis>:
Indirect assignment
A geometry or special axis can be assigned to a link axis indirectly in the logical machine axis
image by specification of a container slot. The container slot then contains the actual name of
the link axis, as described above. This is called a container-link axis. See also Section: "Axis
container (Page 104)".
Synchronous setpoint output
A delay of one interpolator cycle results during the transfer of the setpoints of a link axis for
the setpoint-generating NCU to the home NCU. To ensure that the setpoints for the
interpolation of local axes and link axes are output to the drives at exactly the same time, this
delay must be compensated. To do this, on the setpoint-generating NCU, the number of buffer
elements of the buffer between the interpolator and the position controller must be set one
element larger than the number of buffer elements of the home NCU:
MD18720 $MN_MM_SERVO_FIFO_SIZE= 3
100
Identification of the NCU of the link group in accordance with:
MD12510 $MN_NCU_LINKNO
See Section "Parameter assignment: Link communication (Page 89)"
General machine axis name: AX1, AX2, AX3, ...
Meaning
Machine axis index: 0, 1, 2, ... (max. number of machine axes - 1)
Name of the link axis: NCx_AXy, see Section "Name of a link axis (Page 100)"
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions