Bosch Rexroth PSI 6 Series Operating Instructions Manual page 277

1070080028 / 08 | PSI 6xxx
The LEDs can only display the status of the WT if the logic supply
voltage is present!
Arbitrary pressing of the boot button
Possibility of negative effects on the ongoing production!
Do not ever activate the boot button during ongoing production.
"
" The boot button may be activated by authorized personnel only.
When you press the boot button, the timer aborts the program se­
quence, resets all signal outputs and returns to the "boot" mode
(to firmware upgrade).
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