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modbus support


87boosted

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Just wondering if there is a possibility that support could be added for this standard. Noticed support for Brultech metering, but looking at energy metering solutions....modbus is a tried and true solution. Just keep it modbus TCP, and just read a simple register for energy. Then do what you are doing for the brultech meter. Just an idea...considering modbus is and open source protocol and most energy meters in the commercial sector support it.

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Hello 87boosted,

 

We are very interested in supporting both Modbus and Bacnet. The only issue is ROI: how many can we sell? Currently, you are the only one requesting for this solution!

 

With kind regards,

Michel

 

Just wondering if there is a possibility that support could be added for this standard. Noticed support for Brultech metering, but looking at energy metering solutions....modbus is a tried and true solution. Just keep it modbus TCP, and just read a simple register for energy. Then do what you are doing for the brultech meter. Just an idea...considering modbus is and open source protocol and most energy meters in the commercial sector support it.
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Just a quick answer and to give you my opinion. I currently am an electrical engineer in the power monitoring sector. I have used and have seen just about every meter in the industry, no big surprise, just about every one uses Modbus. If the ISY-99 or ISY-26 could handle the reading of registers on modbus TCP, it opens up another sector. Just the same way you can read, you can write, this then opens up PLC control as well. You are then bridging the gap between control and monitoring. ROI, personally bridging the gap between commercial and residential applications is key. If this device could be setup to plot kW, and keep track of the kWH are key. If you need some help, I have access to several devices that can do exactly what I describe. Btw most commercial meters can bring in pulse outputs as well, so they can read gas, water...etc. You would just need to read registers, or write... I need a device that is NOT a pc to bridge this gap. If this supported modbus, both serial and ethernet, honestly, it would open up alot of possibilities far beyond anything I have seen on the market. The beauty of modbus is mapping devices, it would be great if you let me do the mapping, lol, but techically, you could sell by device requested. There is NOT much to it either...the initial is the investment to build the driver to communicate, from there its up to you.

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Hi 87boosted,

 

Thanks so very much for your detailed response. Our Orchestrator Series currently supports reading meters equipped with Zigbee SEP 1.0/2.0. Orchestrator is only sold to the utilities directly.

 

The main question I have is: with the push for SEP and standardized Energy Service Interface, don't you think Modbus for meter reading will become legacy within the next couple of years?

 

I am very open to using ModBus Ethernet since it does not require hardware modifications (such as additional ports). Is there a minimum level of support/requirements that can provide the maximum amount of functionality?

 

With kind regards,

Michel

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  • 2 months later...

Michael,

Sorry it has taken me so long to answer your question, have been extremely busy as of late.

 

The main question I have is: with the push for SEP and standardized Energy Service Interface, don't you think Modbus for meter reading will become legacy within the next couple of years?

 

To answer this simply, no. Modbus in the power world is THE standard. Ask anyone in the industry what meters they are using and what standard is being used. I am not talking residential markets either, the money is made in larger markets, let google and microsoft scrap it out down below for this so called power standard. There are 20 others springing up daily fighting down below as well. Do I agree with this, well yes and no. You see noone has seemed to bridge the gap very well between the power world, and the automation world. Yes there are modbus solutions, yes there are plc solutions that support modbus, and yes various vendors do parts of this quite well, but none can get one solution for all of this in one package. I know somewhat where you are going above, but remember there are companies that have no interest in broadcasting there usage anywhere besides there own servers. In addition I am sure consumers and lawyers lay in waiting for the day companies begin publishing usage online and scream foul. Where am I going with this??? Quite simply I can go on and on and on, but what I know now is there are thousands of meters in industry right now that support modbus, search ebay and see how many solutions support modbus, now enable read write commands from the the isy-99, and you have the ability to bridge the plc world and the power world, opens up an entire market. Modbus is one of the BEST solutions that you can support because the standard is OPEN to be used by anyone. Every device that uses modbus has registers that are easily read, depending on device can also be written easily, sometimes there are exceptions, BUT the protocol is one of the simplest on the market. Now take serial devices on modbus, they are simply converted to modbus TCP with a gateway. So why do others not use it, honestly because it is probably TOO OPEN. Remember in buisness sharing information between vendors makes it easy for them to implement your solution in their system. Its alot safer for a company to have their own standard and hide behind it with there specific solutions. Is that such a bad thing, for the consumer, and buisnesses it is, but everyone is out to make money.

 

I am very open to using ModBus Ethernet since it does not require hardware modifications (such as additional ports). Is there a minimum level of support/requirements that can provide the maximum amount of functionality?

YES, you will need to make a map for every device you support therefore you can sell the service based on device...or just let me build the map and it will make me even happier!!:). You see modbus has Registers. Holding registers are the 4x registers and are the values that the device is giving back, not OUTPUTS, but values. For instance a voltage would be stored in a 4x register. I can go into detail for input registers and output registers, but google is just as well so I do not waste web space. The mapping behind the device would link to these registers and serve them up. Now what could be done with this, you see you could read the kW value of the house on the ISY, and I could trigger events when it goes over that value, the key is mapping the registers and then storing those values. Mainly kWH for power consumption. In addition kW. I can go on and on, If you want a REALLY good description, or talk about it, just IM me and ill give you a call.

 

Sorry for the winded response, do not disect it too badly, its late and honestly some of it is opinion, but I am not too far off...[/b]

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The first step for you is implementing the modbus standard, the modbus tcp part of it is something like this....

 

you would have the tcp/ip address, then the modbus address. from there you would need to query what type of register you are reading. We can go into detail, but I imagine you can .

 

From there you would read a specific register. If you could code it so I could query within the ISY-99, for instance be able to read modbus address X holding register 4XXX, or write....etc etc etc. then I could do anything within the ISY. The part I am most interested in would be WRITING to the ISY. In addition estimating usage on a weekly monthly yearly basis, and cost. See where I am going??? Ill stop there as there are a million other uses avalable but this is a start.

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  • 1 year later...

87boosted

Have you gone any further with the Modbus protocol? We were able to read and write registers form the ISY-99i development program but it stopped there. Now we just need to get the data mapped to the ISY side..... so close but so far... My company is a Control Systems Itegrator in the industrial world and I believe the ISY would be a great "gateway to the commercial world..if it had Modbus Michel just wants to know ROI and this is where we stopped......

Mark

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