Rockwell Automation 1769-IR6 Compact I/O 1769-IR6 RTD/Resistance Input Module - Manual (Page 53)

Rockwell Automation Publication 1769-UM005B-EN-P - March 2012 53
Module Data, Status, and Channel Configuration Chapter 4
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.
Data Format
Raw/Proportional 0 0 0
Engineering Units 0 0 1
Engr. Units X 10 1 0 0
Scaled-for-PID 0 1 0
Percent Range 0 1 1
Enable/Disable
Channel Enable 1
Disable 0
(1) Ignored for a resistance device input.
(2) Valid only with the 0.5 mA excitation current.
(3) Valid only with the 1.0 mA excitation current.
Table 7 - Channel Configuration Bit Definitions
To Select Make these bit settings
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
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.