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Old March 15th, 2010, 03:04 PM   #1

Syrist is offline
Join Date: Jun 2006
Location: Kitchener
Posts: 17

Hello, I'm trying to access a quantum PLC using ProWorx. Network explorer can find it on modbus plus node 12 but it's status reads "BUSY CONTROLLER". It only started to do this after I tried to reset the PLC by turning off the rack and unplugging the battery.

It seems that no matter what I do the PLC always indicates "BUSY CONTROLLER" and I can't download, get online, etc.

Before I unplugged the PLC the status always showed the correct information.

Any ideas or suggestions would be appreciated... thanks.

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Old March 15th, 2010, 03:54 PM   #2

Syrist is offline
Join Date: Jun 2006
Location: Kitchener
Posts: 17
I fixed it by physically removing the PLC and power supply from the rack and leaving it off (with battery unplugged) for a few minutes. Weird.
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Old January 26th, 2019, 12:50 PM   #3

Ideally is offline
Join Date: Aug 2017
Location: Kirkuk
Posts: 15
I have same as this problem. I do that, but didn't solve yet...
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