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SIMATIC S7-400 / S7-400H / S7-400F /FH: Handbook hot & warm restart

Dear experts
-- I know that the parameter "start up after power on " determines the automatic restart type after power up
-- and i know that the manual cold restart is not allowed any longer by the mode switch 
** my confuse is about (manual hot and warm restart ) 
-- when i make manual restart by PG the software asks me which type of restart do you prefer 
-- And when i make a manual restart for CPUs ( with restart switch (CRST/WRST)) - the restart switch (CRST/WRST) will determine which restart type will be occured when i switch the mode selector from stop to start.
The question is : When i want to make a manual restart for S7-400 CPU which doesn't have a restart switch - When i change the mode selector from stop to run, Hot restart OR warm restart will be executed ?
Thank you

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