# PFC200 No Application after reboot

**URL:** <https://www.wago.community/t/pfc200-no-application-after-reboot/1478>\
**Category:** CODESYS\
**Tags:** pfc200, codesys\
**Created:** [January 17, 2025, 10:33am UTC](https://www.wago.community/t/pfc200-no-application-after-reboot/1478 "2025-01-17T10:33:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![MortenA](https://avatars.discourse-cdn.com/v4/letter/m/9de053/32.png) [@MortenA](https://www.wago.community/u/MortenA)\
**Post date:** [January 17, 2025, 10:33am UTC](https://www.wago.community/t/pfc200-no-application-after-reboot/1478/1 "2025-01-17T10:33:22Z")

</div>

Hello  
I have a PFC200 (750-8214) which I have upgraded the firmware to V040601\_28.  
My problem is that it will not load the application after a reboot.  
By switching System (Internal Falsh) it now running the “old” firmware 04.04.03(26).  
The problem is the same, application is not loading.  
There is no SD-card installed.  
I’m using testet in “CODESYS V3.5 SP20 Patch 3” and “CODESYS V3.5 SP20 Patch 4”

I have previous used PFC100 with firmware 04.04.03(26) and CODESYS V3.5 SP20 Patch 3, without any problems.

From the log message, Source: Standard  
Fri Jan 17 2025 10:47:19.063306 init: System Booted  
Fri Jan 17 2025 10:47:24.006195 CODESYS\_3: KBus is booting  
Fri Jan 17 2025 10:47:26.271533 CODESYS\_3: KBus has booted.  
Fri Jan 17 2025 10:47:26.277054 CODESYS\_3: KBus is operational  
Fri Jan 17 2025 10:47:26.332374 CODESYS\_3: The PROFIBUS DP device has not been opened  
Fri Jan 17 2025 10:47:26.336343 CODESYS\_3: The PROFIBUS DP device has not been opened  
Fri Jan 17 2025 10:47:26.402387 CODESYS\_3: The PROFIBUS DP device has been closed  
Fri Jan 17 2025 10:47:27.138259 CODESYS\_3: PLC is online and no program is loaded  
Fri Jan 17 2025 10:47:27.766792 CODESYS\_3: Application stopped  
Fri Jan 17 2025 10:47:27.937438 CODESYS\_3: PLC: KBUS configuration mismatch

Wago Codesys add-ons:

 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/2X/e/e155d2f5fe170d6d3cdb7c8964d2be0ebbe7bbfa.png)

What can I do, to fix this?

Edit:  
Just to clarify, I can download a application from Codesys, and its will run without any problems, until a reboot.

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<div class="post-metadata">

**Author:** ![MortenA](https://avatars.discourse-cdn.com/v4/letter/m/9de053/32.png) [@MortenA](https://www.wago.community/u/MortenA)\
**Post date:** [January 17, 2025, 12:39pm UTC](https://www.wago.community/t/pfc200-no-application-after-reboot/1478/2 "2025-01-17T12:39:18Z")

</div>

The fix, in Codesys

 ![image](https://us1.discourse-cdn.com/flex016/uploads/wago/original/2X/6/632f3d2879aff665500858073eec5d13f6e51310.png)

The PLC did not have a “Boot application”.  
after creating a boot application, everything now working as intended.