Spectrum Controls 1734sc-IF4U - Manual (Page 38)

3-16 Point IO™ 4 Channel Universal Analog Input Module
User’s Manual Pub. 0300266-01 Rev. A
2/3/4 Wire RTD (Bits 13 and 14)
These bits are used for RTD and Resistance modes only. They are used to specify
2, 3, or 4 wire RTD modes. This setting is ignored for non‐resistance/RTD input
types. Default setting is 3‐wire.
Temperature Scale (Bit 15)
Set to 1 to display degrees Fahrenheit. Otherwise 0 displays temperature in
degrees Celsius (default). This field shall be ignored for non‐temperature ranges.
Section 3.6
Read Input
Data
The input data file contains module status information and analog input data for each of
the input channels. Analog input data is read for each channel, converted to a scaled
digital value, and stored in the input tags. The input tags for the IF4U are located under
the controller tags. The following examples describe the tag structure allocated by the
Generic Module profile and the AOP.
Generic Module Profile:
[Name of remote communication module]:e:x.Data[0 to 198]
e = IF4U slot number
x = Image Type (i.e. C, I, or O)
AOP (Add-On-Profile):
[Name of remote communication module]:e:x
e = IF4U slot number
x = Image Type (i.e. C, I, or O)
Note: The AOP will provide a predefined tag structure for the input tags.
See example below.
Figure 7 (AOP Input Tags)