Output Of Pocket Number (Variable Pocket Coding) - HEIDENHAIN TNC 415 Technical Manual

15.2.2 Output of pocket number (variable pocket coding)

With variable pocket coding, the NC must transfer the pocket number of the called tool to the PLC
(MP7480 = 3 or 4). In this setting, the pocket number is filed in word W262. In addition to the pocket
number, the NC also transfers the current tool number in W264. Variable pocket management (the
assignment of tool number to pocket number in the tool table) is handled by the NC. The PLC can
use marker M2612 to tell the NC that the pocket number in the tool table should not be updated
during "Block scan".
The number of tools with a pocket number is defined in machine parameter MP7261. The input
value for MP7261 matches the number of pockets in the tool magazine. This means that more tools
can be defined in the tool table than there is room for in the tool magazine [(MP7260) > (MP7261)]. If
a tool number is programmed and no pocket is defined for it, pocket number 255 (W262) is
transferred on TOOL CALL, and marker M2402 is set.
Only the tool number and the pocket number are transferred when TOOL DEF is programmed. A
TOOL DEF for a manual tool has no relevance in the PLC.
A fixed pocket can be defined in the field ' F' of the pocket table. Tools for which a fixed pocket is
defined are returned to the same pocket despite variable coding.
Marker Function
M2093 Another T code (P code) follows with TOOL CALL
0 =
or manual tool follows manual tool
or special tool follows special tool
1 =
or special tool follows special tool
or manual tool follows special tool
or manual tool follows normal tool
or normal tool follows manual tool
or normal tool follows special tool
01.98 TNC 407/TNC 415/TNC 425
Normal tool follows normal tool
(N → N)
(M → M)
(S → S) when M2601 = 0
special tool follows manual tool
(M → S)
(S → S), when M2601 = 1
(S → M)
(N → M)
(M → N)
(S → N) (see marker M2600)
15 Tool changer
Set Reset
NC NC
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