Rockwell Automation 1769-IF16V Compact High Density Analog Input Modules - Manual (Page 42)

42 Publication 1769-UM018A-EN-P - October 2008
Chapter 3 Module Data, Status, and Channel Configuration
Engineering Units
The module scales the analog input data to the actual current or
voltage values for the selected input range. The resolution of the
engineering units is 0.001V or 0.001 mA per count.
Scaled-for-PID
The value presented to the controller is a signed integer with zero
representing the lower limit of the normal operating range and 16,383
representing the upper limit of the normal operating range.
Allen-Bradley controllers, such as the MicroLogix 1500 controller, use
this range in their PID equations. The amount over and under the
normal operating range (the full-scale range) is also supported.
Percent Range
The input data is presented as a percentage of the normal operating
range. For example, 0V…10V DC equals 0…100%. The amount over
and under the normal operating range (the full-scale range) is also
supported.
Valid Input Data Word Formats/Ranges
The following table shows the valid formats and min./max. data
ranges provided by the module.
Valid Input Data
Module
Normal
Operating
Input Range
Full Range
(1)
Raw/
Proportional
Data
Engineering
Units
(2)
Scaled-for-PID Percent Range
(3)
Full Range
Full Range Normal
Operating
Range
Full
Range
Normal
Operating
Range
Full
Range
1769-IF16V
-10…10V DC -10.5…10.5V
-32,767…
32,767
-10,500…
10,500
0…16383
-410…
16,793 -10,000…
10,000 -10,500…
10,500
0…5V DC -0.5…5.25V -500…5250 -1638…
17,202
0…10,000
-1000…
10,500
0…10V DC -0.5…10.5V -500… 10,500 -819…
17,202 -500…
10,500
1…5V DC 0.5…5.25V 500…5250 -2048…
17,407 -1250…
10,625
1769-IF16C
0…20 mA 0…21 mA
-32,767…
32,767
0…21,000
0…16383
0…
17,202
0…10,000
0…
10,500
4…20 mA 3.2…21 mA 3200…
21,000 -819…
+17,407 -500…
10,625
(1) includes amounts over and under normal operating range
(2) 1 count = 0.001V or 0.001 mA
(3) 1 count = 0.01%