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VFD motor control causing soft error in microcontroller flash memory
The micro is a philips P89C51RC.In-application programming instructions are activated by a BOOTROM area. There is also a security bit that can be set to keep from erasing the flash. It seems to me that it would be more likely that RAM is being corrupted causing a block erasure. I am also certain...- elarson
- Post #14
- Forum: Electric motors & generators engineering
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VFD motor control causing soft error in microcontroller flash memory
Kieth and Gunnar, thanks for your reply. To answer your questions: The flash has a boot rom which can allow in application programming. I'm going to bring this up again with the CTO. Our station controller was basically a 3 speed fan controller. It pulled on a different relay for the...- elarson
- Post #8
- Forum: Electric motors & generators engineering
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VFD motor control causing soft error in microcontroller flash memory
The wire connection is portable cord. There is actually two microcontrollers in the system. The local board receives a command from a station 10ft away(the second micro which is being corrupted). There is 500 hundred of these systems running. And at least 1 fails a day. Failure meaning that the...- elarson
- Post #5
- Forum: Electric motors & generators engineering
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VFD motor control causing soft error in microcontroller flash memory
The micro is a philips P89C51RC- elarson
- Post #3
- Forum: Electric motors & generators engineering
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VFD motor control causing soft error in microcontroller flash memory
The basic setup is a microcontroller that is providing a 0 - 10 DC voltage level to the VFD. The VFD is connected to a 120VAC fan motor (small horsepower). The problem that is occuring is the flash memory in the microcontroller is getting corrupted. Reprogramming the device corrects the...- elarson
- Thread
- Replies: 22
- Forum: Electric motors & generators engineering
