Epson RC170 Guia do Utilizador descarregar pdf (Página 169)

6. The SPEL+ Language

6.1 Overview

SPEL

is a BASIC-like programming language that runs in the controller. It supports

multitasking, motion control, I/O control.

Programs are written in ASCII text and then compiled into executable object files.

Several language instructions can also be executed in immediate mode from the Command

window.

6.2 Program structure

6.2.1 What is a SPEL+ program?

A SPEL+ program is a collection of functions, variables, and macros. Each line in a

program is a statement. The program statements are stored in one or more program text

files. Every program file has a .PRG extension and resides in the project directory on the

PC and optionally in the controller.

Each project must contain at least one program and there must be one function called

"main". This is the default function. A compile error will occur if function main is not

found.

In addition, seven more programs can be defined in the same project. Each program has its

own start function: main1, main2…main7. Each of the eight programs can be started from

the Operator window, from the remote console, or from VB Guide.

A function definition begins with the Function statement and ends with the Fend statement.

All source statements to be executed by a function must be included within the body of the

function.

The following program file contains two function definitions. Function Main calls

function Func1.

MAIN.PRG

Function Main

Call Func1

...

Fend

Function Func1

Jump pickpnt

...

Fend

6.2.2 Calling functions

You can execute a user function by using the Call statement. The function can reside in

any program file in the current project. To get a return value, you must use the function as

an argument in a statement. You can also omit the Call statement if you don't need the

return value. When Call is omitted, then parentheses for the arguments must not be

supplied

Here are some examples:

Call MyFunc(1, 2)

MyFunc 1, 2

Print MyFunc(1, 2)

EPSON RC+ 5.0 (Ver.5.4) User's Guide Rev.4 151

1 2 ... 164 165 166 167 168 169 170 171 172 173 174 ... 311 312

Comentários a estes Manuais

Sem comentários

Epson RC170 Guia do Utilizador Página 169

Comentários a estes Manuais

Manuais e produtos relacionados com Digitalizar e Imprimir Epson RC170