Hi,
I’m working on an application using an M580 with the NOR module for DNP3 implementation. I have to get all the data into Ignition using the DNP3 protocol but I’m having some problems with the communication.
I’m getting the data from the M580, but for some reason all the analog floating values are interpreted as integers, thus no decimal values are shown. I’ve changed the default value types in the device settings to Float and checked that the configuration of the points is group 40 or 30 and variation 3, but the data is still only integer.
Has someone experienced this before?
Try to add 0.000 to the tag value and see what happens.
This sounds a lot like a bug that was fixed and will be released with 7.9.10.
Thanks for the replys! Managed to solve the decimal visualization problem, though I’m still having problems with writing to the M580. Every value that has decimals is being truncated and written to the PLC as an integer. For example, if I write 3.35 to a tag, Ignition writes a 3 to the variable in the M580.
@Kevin.Herron what was the bug fixed in 7.9.10. Also, when is 7.9.10 released?
There's a related ticket for this too but it looks like it's still open.
Not sure, I'll ask around. I suspect it's a little while out since the conference is coming up soon.
Was this resolved? I’m in 8.1.19 and dealing with my first DNP3 device. The floats are coming in as integers, even tho the variation is set to 3.
If I change the default to float and restart the ignition device I can get the decimal. But just changing the opc item path does not help switch between float and decimal.
I would like to know the same thing, I see in the manual the default value is an integer, but it does not give any direction on how to change that default value for analog inputs.
What version of Ignition are you using and which DNP3 driver (legacy or v2)?
I have set it up both ways, after legacy didn't work i switched back to the newest version.
Generally you don't choose the type in Ignition, you choose it in your outstation.
It gets reported to us as a certain type (DNP3 variation) during the initial integrity poll and subsequent event reports.
The only way to explicitly request a certain type is to use the "gvi" syntax to manually address points, which results in explicits reads to the device instead of event-based polling as DNP3 is intended to work.
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Yes, I changed my variation to 5 on the RTAC and did a wireshark and it is showing a decimal value, i also tried playing around with gvi on the ignition side as well, each time it rounding to a whole number in ignition.
Is your Ignition tag configured with an appropriate datatype? If you dragged it in while it was still integer and then subsequently changed the type in the RTAC to float, you would still need to go change the datatype of the Ignition tag.
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Thank you, that fixed it, feel like a little bit slow as of right now.