User Manual

1 Publication 1746-UM003A-EN-P

Chapter

Preliminary Operating Considerations

This chapter explains how the RTD module and the SLC processor

communicate through the module’s input and output image. It lists the

preliminary setup and operation required before the RTD module can

function in a 1746 I/O system. Topics discussed include how to:

• enter the module ID code

• address your RTD module

• select the proper input filter for each channel

• calculate the RTD module update time

• interpret the RTD module response to slot disabling

Module ID Code

The module identification code is a unique number encoded for each 1746

I/O module. The code defines for the processor the type of I/O or specialty

module residing in a specific slot in the 1746 chassis.

To manually enter the module ID code, select (other) from the list of modules

on the system I/O configuration display. The module ID code for the RTD

module is shown below:

No special I/O configuration information is required for Class 1. The module

ID code automatically assigns the correct number of input and output words.

For Class 3 the user must assign the correct number of input and output words

(16 and 24).

Operating Class ID Code

Class 1 3508

Class 3 12708