Periodic Saving of Variable Values to Non-Volatile Memory

T3000 Software
1

Hi Temco Technical Support,

I have a question regarding the T3-TB-11i and T3-BB-32i controllers.

Is there any command or function that allows a Variable value to be saved periodically to non-volatile memory, so that the value can be retained after a power failure?

I don’t need the value to be saved exactly at the moment when the power is turned off. A periodic save mechanism (for example, every few minutes) would be sufficient.

My application is a long-duration timer/counter running over several days. I can accept an error of a few minutes or even an hour after a power failure. The main requirement is that the Variable value can be restored when the controller starts up again and the counter can continue from the previously saved value.

Could you please let me know if the T3-TB-11i or T3-BB-32i supports this function, and if so, which command or configuration should be used?

Thank you.

2

Yes, this function is available. Auto‑save can be configured. However, considering the service‑life limitation of flash memory, we generally do not recommend customers to use this feature. If you do use it, the minimum save interval is 60 minutes. The system will automatically save IN, OUT and VAR point data. Please refer to the screenshot below showing how to enable this function via T3000.

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3

We will look into doing something more robust with this feature.

The clock chip on board our products I believe has some ram backed by the supercap which is good for a few days. If the RTC doesnt have ram we can add an E2 chip on the next board rev.

More news on this shortly.