Temperature in gcode  

Temperature in gcode

Hi,
First sorry for my English.
I begin to use my MultiMatrial kit and try to make a part of ABS supported by PLA.
However my question is the same with ABS + Verbatim BVOH or other.

In the Gcode generates by Slic3r I see this at the start (... to replace many lines for the sake of sanity ) :

; generated by Slic3r 1.37.1-prusa3d-win64 on 2017-11-12 at 19:28:07
...
; Start G-Code sequence START
T0
M104 S260 ; set extruder temp
M140 S105 ; set bed temp
M190 S105 ; wait for bed temp
M109 S260 ; wait for extruder temp
...
T0
;--------------------
; CP PRIMING START
;--------------------
M220 S100
G1 X5.000 F7200
M907 E750
T0
M220 S100
G4 S0
; CP TOOLCHANGE LOAD
...
G1 Y2.200 F7200
; CP TOOLCHANGE UNLOAD
...
M104 S260
...
G4 S0
G1 X65.000 Y0.000 F7200
T3
M220 S100
G4 S0
; CP TOOLCHANGE LOAD
...
M907 E550
; CP TOOLCHANGE WIPE
...
; CP PRIMING END
;------------------


We see T0 and T3 for the change to the Extruder 0 and 3 the issue I have concern the temperature.
At the start we can see that :

M104 S260 ; set extruder temp
M140 S105 ; set bed temp
M190 S105 ; wait for bed temp
M109 S260 ; wait for extruder temp

if i undestand correctly the begin with 260°C in extruder and 105°C on bed.
When we select extruder T0 the temperature is correct (260/105).
But when we select the T3 extruder I can't see any M104 and/or M140 command then... my PLA gonna burn...

Can anybody point me what I don't understand ?

You can reproduce this gcode file simply in slic3r :

Thank you.