# How can load OS to 4PPC70 plc , if I can not put The plc in BOOT mode. I reset the plc and nor can not load OS start the PLC but never load the OS **URL:** \ **Category:** B&R Software & Runtime\ **Tags:** automation-runtime, t-c-panels\ **Created:** [December 10, 2025, 10:06pm UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339 "2025-12-10T22:06:25Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Hugo\_Guerrero](https://avatars.discourse-cdn.com/v4/letter/h/FF8800/32.png) [@Hugo\_Guerrero](https://community.br-automation.com/u/Hugo_Guerrero)\ **Post date:** [December 10, 2025, 10:06pm UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339/1 "2025-12-10T22:06:25Z")
I reset one PLC $PPC70 from the reset button, and now never start, not load OS, ans can not put in BOOT mode and can not connet with As software. and not read the USB becase never put in BOOt mode. ---
**Author:** ![pavel.vavra](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/pavel.vavra/32/9893_2.png) [@pavel.vavra](https://community.br-automation.com/u/pavel.vavra)\ **Post date:** [December 11, 2025, 6:07am UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339/2 "2025-12-11T06:07:47Z")
Hello and welcome to the Community, From my experience, if there is no HW fault, it should always be possible to switch [to the BOOT mode with the reset button](https://help.br-automation.com/#/en/4/hardware/powerpanel_c70/betriebsmodi_resettaster.html). Are you doing it properly - press the key briefly, a short pause, and then press and hold the key? It can sometimes be a bit tricky. ---
**Author:** ![kovarj](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/kovarj/32/537_2.png) [@kovarj](https://community.br-automation.com/u/kovarj)\ **Post date:** [December 16, 2025, 9:29am UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339/3 "2025-12-16T09:29:53Z")
Hi @Hugo_Guerrero , what is the status of your topic, have you been able to load OS to your PPC70? ---
**Author:** ![Hugo\_Guerrero](https://avatars.discourse-cdn.com/v4/letter/h/FF8800/32.png) [@Hugo\_Guerrero](https://community.br-automation.com/u/Hugo_Guerrero)\ **Post date:** [December 18, 2025, 11:53pm UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339/4 "2025-12-18T23:53:08Z")
No I can not load because never put the ip adress in the plc ---
**Author:** ![Hugo\_Guerrero](https://avatars.discourse-cdn.com/v4/letter/h/FF8800/32.png) [@Hugo\_Guerrero](https://community.br-automation.com/u/Hugo_Guerrero)\ **Post date:** [December 18, 2025, 11:55pm UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339/5 "2025-12-18T23:55:33Z")
I never put in BOOT i do all the combinations possible with the reset bottom ---
**Author:** ![kovarj](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/kovarj/32/537_2.png) [@kovarj](https://community.br-automation.com/u/kovarj)\ **Post date:** [December 19, 2025, 7:26am UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339/6 "2025-12-19T07:26:28Z")
Is it new hw or used one? ---
**Author:** ![Hugo\_Guerrero](https://avatars.discourse-cdn.com/v4/letter/h/FF8800/32.png) [@Hugo\_Guerrero](https://community.br-automation.com/u/Hugo_Guerrero)\ **Post date:** [December 26, 2025, 4:54pm UTC](https://community.br-automation.com/t/how-can-load-os-to-4ppc70-plc-if-i-can-not-put-the-plc-in-boot-mode-i-reset-the-plc-and-nor-can-not-load-os-start-the-plc-but-never-load-the-os/9339/7 "2025-12-26T16:54:41Z")
Used one, I was used in one machine but disarm it. the PLC was work only reset with button.