save tool number in var file and load on start

I have automatic tool changer with 12 tools. Every switch represent one tool. What do i have to do ,to save current tool into .var file and to be loaded when emc start , to avoid tool changer indexing(ref) ?

At the end of your code run
#4999=#5400
Current tool is already in #5400 but it is volatile
If #4999 is in your var file it will be preserved

Next start up run
M61 Q#4999

regards

I have found this about parameters:
System Parameters
#<_current_tool> - Return number of the current tool in spindle. Same as #5400.

At the end of your code run
#4999=#5400
.... can i make assigment in classicladder ?
Where to put M61 Q#4999 into ini file to auto run code?

.... can i make assigment in classicladder ?

No idea, but why would you want to, doing it in gcode is simple.

Where to put M61 Q#4999 into ini file to auto run code?

There is no provision in the ini file for that.

You could put the code in one of the ini file halui MDI strings and connect via a flipflop say to the last homed of your axes
via the haui.axis.N.ishomed, so that the tool would be set when you home all axes for the first time.