Spectrum-controls 1746sc-INO4vi Manual de usuario descargar pdf (Pagina 23)

Things To Consider Before Using

Your Module

Read this chapter to familiarize yourself with:

• how the processor communicates with your module

• channel update time

• channel enable and disable times

• temperature calibration time

• output mode change time (-INO4vi only)

• your module’s response to slot disabling

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 image table for your output module.

Figure 3. Output and input scans

Input

Scan

Output Image

Slot e

Input Image

Slot e

SLC 5/0X

Data Files

Output Image

8 Words

Input Image

8 Words

Output

Scan

-INO4

Output & Input Image

Channel Update Time

For an output module, channel update time is the time required for the

module to convert the channel data received from the processor to an

analog output signal at the terminals.

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Spectrum-controls 1746sc-INO4vi Manual de usuario Pagina 23