Rockwell Automation Allen-Bradley 1769-IF4, Руководство пользователя

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Publication 1769-UM002B-EN-P - July 2005
3-28 Module Data, Status, and Channel Configuration for the Input Modules
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
dependent on the range selected and the filter selected. See Table 3.17 Valid
Input Data on page 3-28.
Scaled-for-PID
The value presented to the controller is a signed integer with zero representing
the lower user range and 16383 representing the upper user range.
Allen-Bradley controllers, such as the MicroLogix 1500, use this range in their
PID equations. The amount over and under user range (full scale range -410 to
16793) is also included. See Table 3.17 Valid Input Data on page 3-28.
Percent Range
The input data is presented as a percentage of the user range. For example, 0V
to 10V dc equals 0% to 100%.
See Table 3.17 on page 3-28.
Valid Input Data Word Formats/Ranges
The following table shows the valid formats and min./max. data ranges
provided by the module.
Table 3.17 Valid Input Data
1769-IF8
Normal
Operating
Input Range Full Range
(Includes amounts
Over and Under
Normal Operating
Range) Raw/Pro
portional
Data Engineering
Units Scaled-for-PID Percent
Full Range Normal
Operating
Range Full Range Normal
Operating
Range Full Range
-10V to
+10V dc +10.5V to -10.5V -32767 to
+32767 -10500 to
+10500
0 to 16383
-410 to 16793 -100 to
+100% -105.00 to
105.00%
0V to 5V dc 0.0V to 5.25V -27068 to
+32767 0 to 5250
0 to 17202
0 to 100%
0 to
105.00%
0V to 10V dc 0.0V to 10.5V -29788 to
+32767 0 to 10500
4 mA to
20 mA 3.2 mA to 21 mA
-32767 to
+32767
3200 to
21000 -819 to
+17407 -5.00 to
+106.25%
1.0V to 5V dc 0.5V to 5.25V 500 to 5250 -2048 to
17407 -12.50 to
+106.25%
0 mA to
20 mA 0 mA to 21 mA 0 to 21000 0 to 17202 0.00 to
105.00%