System variable Meaning
$C_TS_PROG Bool variable
This variable indicates whether an identifier is available in
$C_TS
$C_TE This variable returns the address extension of the T word.
$C_TCA Bool variable
This variable indicates whether the TCA replacement is active
$C_DUPLO_PROG Bool variable
This variable indicates whether the Duplo number has been
programmed for the TCA replacement.
$C_DUPLO For $C_DUPLO_PROG == TRUE, this variable contains the
value of the programmed duplo number.
$C_THNO_PROG Bool variable
This
variable indicates whether the toolholder/spindle number
has been programmed for the TCA replacement.
$C_THNO For $C_THNO_PROG == TRUE, this variable contains the val‐
ue of the programmed toolholder/spindle number
$C_D This variable contains the programmed D number.
$C_D_PROG Bool variable
This variable indicates whether an offset number is available
in $C_D
$C_DL This variable contains the programmed D total/setup offset.
$C_DL_PROG Bool variable
This variable indicates whether an offset number is available
in $C_DL.
$C_ME This variable contains the address extension of the M word.
$C_M This variable contains the value of the replaced address M (in‐
teger).
$C_M_PROG This variable contains the value TRUE, if the M function was
programmed for the tool change.
System variables of the tool management interface
System variable Meaning
$AC_TC_FCT Function number (command number of the NC)
$AC_TC_STATUS Status of the command to be read via $AC_TC_FCT.
$AC_TC_THNO Number of the toolholder (spindle number) where the new tool
should be loaded.
$AC_TC_TNO Internal T number of the tool to be replaced or prepared.
$AC_TC_MFN Source magazine number of the new tool.
$AC_TC_LFN Source location number of the new tool.
$AC_TC_MTN Target magazine number of new tool.
$AC_TC_LTN Target location number of the new tool.
$AC_TC_MFO Source magazine number of the old tool (to be removed).
$AC_TC_LFO Source location number of the old tool (to be removed).
$AC_TC_MTO Source magazine number of the old tool (to be removed).
Tool management
9.5 Replace T, M or D function
SINUMERIK Operate
Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3 303
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