1 CHAPTER OVERVIEWThis chapter introduces the PSL (Programmable Scheme Logic) Editor, and describes the configuration of the digitalinputs and outputs. It provides an outline of scheme logic concepts and the PSL Editor. This is followed by detailsabout allocation of the digital inputs and outputs, which require the use of the PSL Editor. A separate "SettingsApplication Software" document is available that gives a comprehensive description of the PSL, but enoughinformation is provided in this chapter to allow you to allocate the principal digital inputs and outputs.This chapter contains the following sections:Chapter Overview 485Configuring Digital Inputs and Outputs 486Scheme Logic 487Configuring the Opto-Inputs 489Assigning the Output Relays 490Fixed Function LEDs 491Configuring Programmable LEDs 492Function Keys 494Control Inputs 495P543i/P545i Chapter 19 - Digital I/O and PSL ConfigurationP54x1i-TM-EN-1 485
