GFK-2950C February 2018 1
Chapter 1 Introduction
This manual contains general information about programming a PACSystems CPU. It also provides
detailed descriptions of specific programming requirements.
For a general introduction to the PACSystems family of products, including new features, product
overviews, and specifications, see PACSystems RX7i, RX3i and RSTi-EP CPU Reference Manual,
GFK-2222.
Programming Features are described in Chapter 2 through Chapter 8.
▪ Elements of an Application Program: Chapter 2
▪ Program Data: Chapter 3
▪ Ladder Diagram (LD) instruction set reference: Chapter 4
▪ Function Block Diagram (FBD) instruction set reference: Chapter 5
▪ The Service Request Function: Chapter 6
▪ The PID Function: Chapter 7
▪ Structured Text (ST): Chapter 8
Diagnostics, including Fault Handling and Diagnostic Logic Blocks are described in Chapter 9.
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