User Manual for EZ-220, EZ-420, EZ-220L, EZ

INTRODUCTION

User’s Manual

Introduction to the EZText Enhanced Panel

The EZText Enhanced Panels provide a man-machine interface to your PLC automation system. The panels provide features such as 5 user-defi ned

pushbuttons with LED indicators, arrow adjust buttons, and a built-in menu system. The panels communicate with a PLC using either RS-232C or RS-

422A/485A serial communication. Confi guration software and panel programming are covered in chapter 5 of this manual.

The panels allow you to confi gure up to 256 20-character text strings confi gured as PLC Messages and Local Messages. Local Messages are internal panel messages that the operator can scroll in a menu tree hierarchy. PLC Messages are displayed when prompted from the PLC program. A PLC Message LED illuminates whenever a PLC Message is being displayed. Either message type can have up to three embedded data variables, one of which can be edited by using the arrow adjust buttons.

The panels have sealed membrane function pushbuttons that allow you to trigger

PLC actions with the push of a button. These pushbuttons are used for input signals to the PLC. Each pushbutton can be confi gured to function as one of three switch types:

• ALTERNATE—keeps its current state until the button is pushed again

• PANEL SET AND PLC RELEASE —sets a bit in the PLC when pressed and is reset by either the PLC program or by pressing the button again.

The LCD display window supports two or four message lines that can display up to 20 characters each. The messages are programmed using the EZText

Enhanced Programming Software. The message control type may be either

static—text displays that have NO embedded data, dynamic —text messages that include embedded data (READ access only), or interactive —text messages that allow the operator to enter data, or change values that are stored in the PLC registers (READ/WRITE access).

The EZText Enhanced Panel is available in a variety of models to suit your application. Key features are provided on page 10.

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