...

To do this manually, it was covered in the CurConvert Options doc.

Common Errors

Most common errors are below. 

1. Make sure the numeric point doesn't include units. If so, you'll get an error similar to the below but with the unit it has.
   curErr:
   haystack::UnknownNameErr: codeToName: 0%
   pointExt::EnumDef.codeToName (EnumDefs.fan:137)
   pointExt::EnumNumberToStrConvert.doConvert (PointConvert.fan:709)
   pointExt::EnumConvert.convert (PointConvert.fan:694)
   connExt::ConnPoint.updateCurOk (ConnPoint.fan:150)
   haystackExt::HaystackConn.syncPoint (HaystackConn.fan:219)
   haystackExt::HaystackConn.onPoll (HaystackConn.fan:367)
   fan.sys.List.each (List.java:588)
   haystack::GbGrid.each (GridBuilder.fan:350)
   haystackExt::HaystackConn.onPoll (HaystackConn.fan:357)
   connExt::Conn.doPoll (Conn.fan:897)
   connExt::ConnActor.receive (ConnActor.fan:165)
   concurrent::Actor._dispatch (Actor.java:234)
   concurrent::Actor._work (Actor.java:204)
   concurrent::ThreadPool$Worker.run (ThreadPool.java:262)
   1. There is a way around this if you make the curConvert as "numberToHex() strToNumber() enumNumberToStr(foo)". If writable, writeConvert is something like this but with unit using "enumStrToNumber(foo) as(%)".