Examples; Link Axis - Siemens SINUMERIK Series Function Manual

B3: Distributed systems - 840D sl only

2.3 Examples

Different systems of units
Different systems of units are possible in spite of an active link group, as long as no cross
NCU interpolation takes place. The system of units settings are made for a specific NCU in
the part program or synchronous action using G commands (
References
Function Manual, Basic Functions; Velocities, Setpoint-Actual Value Systems, Closed-Loop
Control (G2)
2.3 Examples
2.3.1

Link axis

Parameter example for two NCUs each with a link axis
NCU1
Machine data
General link data:
$MN_NCU_LINKNO = 1
$MN_MM_NCU_LINK_MASK = 1
$MN_MM_SERVO_FIFO_SIZE = 3
$MN_MM_LINK_NUM_OF_MODULES = 2
Logical machine axis image (LAI):
$MN_AXCONF_LOGIC_MACHAX_TAB[0] = "AX1"
$MN_AXCONF_LOGIC_MACHAX_TAB[1] = "AX2"
$MN_AXCONF_LOGIC_MACHAX_TAB[2] = "NC2_AX3"
Machine axis name, unique system-wide as NCU identifier:
$MN_AXCONF_MACHAX_NAME_TAB[0] = "NC1_A1"
$MN_AXCONF_MACHAX_NAME_TAB[1] = "NC1_A2"
$MN_AXCONF_MACHAX_NAME_TAB[2] = "NC1_A3"
Assignment of channel axis to machine axis:
$MC_AXCONF_MACHAX_USED[0] = 1
$MC_AXCONF_MACHAX_USED[1] = 2
$MC_AXCONF_MACHAX_USED[2]=3
122
Note
Master NCU
Set NCU-link active
Size of the data buffer between interpolation and position
control
Number of link modules
Local machine axis
Local machine axis
Link axis
1. Channel axis to the machine axis of LAI[0]
2. Channel axis to the machine axis of LAI[1]
3. Channel axis to the machine axis of LAI[2]
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
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G70 G71 G700 G710
Extended Functions