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matth-x / MicroOcpp

OCPP 1.6 client for microcontrollers
MIT License
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What value do I measure with "L1" compared to "L1-N" and "L1-L2", according to the protocol specifications? What value do I get via "L1"? #318

Open ZvonimirRaic opened 1 month ago

ZvonimirRaic commented 1 month ago

Ciao,

It is not clear to me, looking at the specification of the protocol itself, what value is measured with the variable/value "L1"? Shouldn't "L1-N" be used to measure the phase voltage, if the current is measured it would be clear to me, so I don't know what is measured across the phase with the value of L1 and what measured value we get only with L1, except for the marking of the first phase of a three-phase system? If there is no potential difference on L1 itself, what does the result of that value represent, in relation to voltage, current, power?

The question was about this function below:

addMeterValueInput([](){return (int32_t)33;}, "Energy.Active.Import.Register", "kW", "Body", "L1", 1);

I noticed this and by looking through earlier queries I was unable to find out #110, #185.

I would like to know, so if you can help me then know how to better define the values ​​related to phase AC measurements, for better diagnostic settings?

matth-x commented 1 month ago

Hi @ZvonimirRaic,

Interesting question, didn't notice this before.

Instead of "L1", you can insert any value of the following table (OCPP 1.6 ed. 2, page 89):

image

I never had the case where the energy was reported per phase and I don't know if OCPP backend systems process that information in a meaningful way. If you rather want to report the overall energy register (i.e. consumption over all phases), you can omit the phase field by passing nullptr.