Minh_Tran

Latch Data of PLC Mitsubishi Q03UDE

9 posts in this topic

Hello everyone!

I'm the new of site. I have a PLC Mitsubishi Q03UDE and want to latch data of D register. I've set the latch data from D500 to D580 in PLC Parameter, you can see it in the picture i've attached. It seems work well when I turn on PLC everyday, but when i turn off PLC for a few days ( about two or three days ), all the data goes to 0. So can you tell me what's the problem ? My PLC have no battery.

Thank you in advance for your help.

Capture.JPG

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Well there you go you have no battery !!!!

 

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Thank you sir!

So what can i do to latch data? I have known that the PLC have the RAM and ROM, can I write it to them and how to write?

 

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Well you can add a battery.  :)

Is the data static or does it change continuously? 

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But my PLC have a memory card Q2MEM-1MBS. Can I latch data into memory card and restore it when PLC power on? Thanks!

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Yes create some file registers (R devices) on the MEM card and use those instead of D500 or make a copy at the beginning and end of the program.


 

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When powering off the PLC without a battery- you have approximatley 3 minutes before the standard ROM capactors will completley discharge..

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