Input Image File; Input Data File - Spectrum Controls 1769 User Manual

3-10 Chapter 3: Module, Data, Status, and Channel Configuration
Example 1 Channels enabled for different input types
Example 2 All Channel enabled for 3 wire RTD
Example 3 All Channel enabled for 3 wire RTD
Input
Image File
Input
Data File
User's Manual Pub. 0300241-02 Rev. A
Channel 0 Input: 3-wire 100 Ω Pt 385 RTD with 4.17 Hz Filter,
Lead Compensation enabled.
Channel (1 – 5) Input: 3000Ω resistance with 10 Hz Filter
Lead Compensation enabled
Module update time with lead compensation enabled
= slowest channel update time
= 964 ms
Channel (0 – 5) Input: 3 Wire 100 Pt 385 RTD with 470 Hz Filter
Module update time with lead compensation enabled
= slowest channel update time
= 10 ms
Channel (0 – 5) Input: 3 Wire 100 Pt 385 RTD with 470 Hz Filter
Module update time with lead compensation disabled
= slowest channel update time
= 4 ms
The input image file represents data words and status words. Input words 0
through 5 hold the input data that represents the value of the analog inputs for
channels 0 through 5. These data words are valid only when the channel is
enabled and there are no errors. Input words 6 and 7 hold the status bits. To
receive valid status information, the channel must be enabled.
You can access the information in the input image file using the programming
software configuration screen. For information on configuring the module in a
MicroLogix 1500 system using RSLogix 500, see Appendix B; for
CompactLogix using RSLogix 5000, see Appendix C.
The input data table allows you to access module read data for use in the control
program, via word and bit access. The data table structure is shown in table
below.