Rockwell Automation 1762-IR4 RTD/Resistance Input Module - Manual (Page 43)

Publication 1762-UM003A-EN-P - February 2003
Module Data, Status, and Channel Configuration 3-9
Enabling or Disabling a Channel (Bit 15)
Bit 15 enables or disables each of the six channels individually. The
module only scans those channels that are enabled. Enabling a
channel forces it to be recalibrated before it measures input data.
Turning a channel off results in the channel data being set to zero.
Selecting Data Format (Bits 12 to 14)
Bits 12 through 14 of the channel configuration word are used to
indicate the input data format. You may choose any of the following
formats:
•
raw/proportional
•
engineering units x 1
•
engineering units x 10
•
scaled for PID
•
percent of full scale
TIP
When a channel is not enabled, the A/D converter
provides no input to the controller. This speeds up
the system response of the active channels.
The configuration default is to disable each input
channel to maximize module performance.
TIP
The engineering units data formats represent real
temperature or resistance engineering units provided
by the module. The raw/proportional counts,
scaled-for-PID, and percent of full scale data formats
The raw/proportional counts, scaled-for-PID and
percent of full-scale data formats may yield the
highest effective resolutions, but may also require
that you convert channel data to real engineering
units in your control program.