Search found 5 matches

by ctacke
Thu Mar 26, 2015 2:33 pm
Forum: Electric Meters
Topic: AutoCAD drawings
Replies: 0
Views: 25330

AutoCAD drawings

We have several Omnimeter v4 meters that we are deploying. We need to do mechanical drawings of our entire systems and it would be really helpful if you have AutoCAD drawings (EWG or DXF) of your devices that we could just import. Do you have drawings you could post or share?
by ctacke
Thu Oct 23, 2014 4:13 pm
Forum: Electric Meters
Topic: RS485 for Relay Outputs
Replies: 7
Views: 5699

Re: RS485 for Relay Outputs

Yep, I figured out the CRC (I determined it was the modbus polynomial of 0xa001). In C# it looks like this: private static byte[] AppendCRC(IEnumerable<byte> data) { var message = data.ToArray(); // skip the first byte var offset = 1; var length = message.Length - 1; var seed = 0xffff; byte high = 0...
by ctacke
Thu Oct 23, 2014 3:22 pm
Forum: Electric Meters
Topic: RS485 for Relay Outputs
Replies: 7
Views: 5699

Re: RS485 for Relay Outputs

What would be extremely useful for people trying to create software would be a breakdown of those commands, like you do with the parsing of the v4 read. For example, you have the "send password" as this: 01 50 31 02 28 30 30 30 30 30 30 30 30 29 03 32 44 What are the components of this? Which part i...
by ctacke
Thu Oct 23, 2014 2:35 pm
Forum: Electric Meters
Topic: RS485 for Relay Outputs
Replies: 7
Views: 5699

Re: RS485 for Relay Outputs

Thanks for the details.

I would have gone the route of using the EKM Dash software, but it has never been able to connect to my meter, even running on the same PC, using the same COM port as my own software which does communicate with it just fine.
by ctacke
Tue Oct 21, 2014 11:09 am
Forum: Electric Meters
Topic: RS485 for Relay Outputs
Replies: 7
Views: 5699

RS485 for Relay Outputs

The documentation on the exact commands to send over RS485 to set the relay states isn't 100% clear to me. This is my understanding so far is that it generally looks like this, but the data in the set parts I don't understand. I'm able to read data just fine. Send Full Meter Request (Master) Receive...