I have a Channels table, with one column being the unit a channel is on. This can change, and is simply the name of the unit. I have another table in the driver that is the list of units, containing information like the serial number.
How can I trend the unit the channel is on?
Trending on strings does not work, nor does a dynamic discrete. There is no numeric representation (from the device) of the unit that is unique.
Any information is appreciated. Thanks.
Update with what the current trending looks like:
I mean that on the trend graph when trending=true is set, values like '1' or '2' is set, and you can't see the string values that were at the set time.
That looks like an issue to me, let's investigate via a collaboration task.
Hi Blake,
We have come across the same issue ourselves.
If you are comfortable editing a protocol using dis, you can edit the following fields.
Where the Raw type is "other" change to "numeric text" and the Type from "string" to "Double"
<Interprete>
<RawType>numeric text</RawType>
<LengthType>next param</LengthType>
<Type>double</Type>
</Interprete>
Then, under Measurement, change "string" to "number"
<Measurement>
<Type>number</Type>
</Measurement>
You can then enter a unit for the display as it is now a number and not a string.
I hope that helps.
When you say 'Trending on Strings does not work', do you mean the driver does not allow it (so trending="true" has not been set on the read param)?