Spectrum Controls 1746sc-INI4i, User Manual

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User’s Manual Pub. 0300266-04 Rev. A
Chapter 3
Configuring the 1746sc-
INI4I
This chapter covers the following subjects:
•
How the processor communicates with your module.
• The difference between channel update time and step response time.
• Selecting an input filter frequency.
•
Auto-calibration time.
•
Channel enable and disable times.
•
Your module’s response to slot disabling.
Section 3.1
How the Processor
Communicates
With Your Module
Your processor transfers data to (and receives data from) the processor through
an image table residing in the data files of your processor. The processor updates
this image table once during each scan of your ladder program. Figure 4 shows
the output and input image table for your input module:
Figure 3-1. Image Table for Your Isolated Analog Input Module
Example – If you want to reconfigure channel 2 on your input module, and it is
in slot 4 of the SLC chassis, you would modify the configuration word at address