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7-1
IM 05P07A01-01EN
Functions and
Applications of I Relays (for UT55A/UT52A/UP55A)
7
7.1 Overview
This chapter describes the functions and applications of the I relays.
I relays are used in ladder program, Modbus communication, PC link communication,
and contact input / output functions.
I relays contain status information of errors, operation, and alarms. Contents of I relays
can be read only by means of communication using a host computer. (Note that the
I relays have the same information as the D registers but with I relays, some of the
information is read-only.).
► Contact input and output functions: Chapter 12 Contact Input and Output Functions of the
UTAdvanced User's Manual
Use of the I relays enables the following:
Centralized control by the host computer
D registers and I relays oh the UTAdvanced are used for parameter settings or ladder
program creations of LL50A Parameter Setting Software.
Chapter 7 Functions and Applications of I Relays (for UT55A/UT52A/UP55A)
Summary of Contents for UTAdvanced Series
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