PM 8000 pulse signal (reset the pulse signal by Com)

[JeonghyunSong]

We are trying to get the pulse input data from water meters, gas meters(with PM 8000).

but customer want to reset every month of the pulse data (the weigh of pulse)

So, can we reset the pulse data by communication ? when I look at the manual(map), I could not find the address of the reset

[Charles_Murison · Accepted solution]

Hello @JeonghyunSong ,

I would like to confirm what you are wanting to do given "the weigh of pulse" could possibly mean how much water per pulse needs to change each month.

I am assuming you have a constraint amount of water per pulse, as known as pulse weight, and that you want to accumulate this volume per month and possible reset this via modbus or ION coms.

To start, there are 2 modules involved with Digital inputs. First is the digital input module , this is where you can configure what type of pulse, KYZ vs pulse, physical port, polarity etc. The second module is the counter module, where you define the pulse weight and can reset the counts. 

Likely you will need to modify the meter's framework to link a pulse merge module to the counter's reset input. The input to the pulse merge would be clock modules new month pulse and an external pulse module. The modbus map module does have the address for the different external pulse modules. Writing to this module would generate a pulse inside the meter that could be used to reset desired modules.

Regards,

Charles

[JeonghyunSong]

Thank you so much Charles 🙂

I understood that in order to perform count reset, an external reset pulse signal must be received. So, it seems that the PM8000 generates a pulse to reset the count(internally).

When I saw the Data Mapping Module at Digital Input Count Reset of PM8000, it was IOM. IOM is 'This module contains IO values such as digital input and outputs, resets, and setpoints'.

To summarize again, I can send a reset signal to PM8000 digital input by using the output of PLC or meter with Modbus or ION protocol.

If that's right, can't you give the digital input a signal by generating the PM8000's own output (reset signal)?

Pic

Thank you

Best regards

[Charles_Murison]

Hello @JeonghyunSong ,

You will notice that the resets you show in the screenshot have N/A for the register address. This means there is no modbus address that can trigger this by default. That is no to say you cannot do what you are looking for. ION meter can be highly customized to do may different tasks. 

"If that's right, can't you give the digital input a signal by generating the PM8000's own output (reset signal)?"
I am not sure I follow this question, are you asking about connecting the Digital output of the PM8000 to it's own Digital input?

Regards,

Charles