System Variables To Enter A Leading Value - Siemens SINUMERIK Series Function Manual

B3: Distributed systems - 840D sl only
2.2 NCU link
Leading, lead-link and following axis
NC-specific machine data
Number Identifier $MN_
MD10000 AXCONF_MACHAX_NAME_TAB
MD10002 AXCONF_LOGIC_MACHAX_TAB
Channel-specific machine data
Number Identifier $MC_
MD20070 AXCONF_MACHAX_USED
Axis-specific machine data
Number Identifier $MA_
MD30554 AXCONF_ASSIGN_MASTER_NCU
2.2.5.3

System variables to enter a leading value

Leading values can be specified on the NCU of the leading axis using the following system
variable:
● Position leading value: $AA_LEAD_SP[<leading axis>]
● Velocity leading value: $AA_LEAD_SV[<leading axis>]
When making a change, the values are also transferred to the NCU of the following axis per
NCU link.
Note
These system variables have a lower transfer priority than those of the link variables.
120
Meaning
Machine axis name
Logical machine axis image
Meaning
Used machine axis
Meaning
Master NCU
If a machine axis can be traversed for several NCUs, one NCU must
be defined as master NCU. The setpoint generation is made after the
startup of the control for this NCU.
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
Extended Functions