Property: Offset for DirectAccessChannel

Property: Offset for DirectAccessChannel

Specifies the offset that is added when a value is read.

This property, used with the Factor property, can be used to calibrate values as they are read in. The formula for conversion is as follows:

Value = Factor*File value + Offset.

Object.Offset

Note  The properties Factor and Offset are ignored when text channels and time channels are read. For all other channel types, the conversion formula returns a Real result.

The following example creates a new channel group with a DirectAccess channel. When the channel values are read, each value is first multiplied by the factor 2, and then the offset 5 is added.

Dim oBlock: Set oBlock= File.GetBinaryBlock()
Dim oChn  : Set oChn  = oBlock.Channels.Add("MyChannel",eI32)
Dim oMyGrp: Set oMyGrp= Root.ChannelGroups.Add("MyChannelGroup")
Dim oMyChn: Set oMyChn= oMyGrp.Channels.AddDirectAccessChannel(oChn)
oMyChn.Factor = 2
oMyChn.Offset = 5