Epson RC170 Betriebsanweisung PDF herunterladen (Seite 173)

6. The SPEL+ Language

6.7.4 Global variables

Global variables can be shared between all functions in a project. The Global instruction is

used to declare a global variable.

To declare global variables in a program, use the Global instruction with the desired

variable type (Boolean, Byte, Integer, Long, Real, Double, String) at the beginning of the

program before any Function statements:

One way to indicate that variables are global is to precede the name with "g_", as shown in

the example below.

Program: MAIN.PRG

Global Integer g_TotalCycles

Function main

Call LoadPart

...

Fend

Program: LOADPART.PRG

Function LoadPart

Jump pick

On gripper

Wait .1

Jump place

Off gripper

Wait .1

g_TotalCycles = g_TotalCycles + 1

Fend

For more information, see Data Types.

6.7.5 Global Preserve variables

You can preserve global variable values by using the optional Preserve parameter when

you declare global variables.

Preserved variables are stored in the controller’s SRAM.

If the data type of a preserved variable is changed, or the number of dimensions is changed,

then the variable values will be cleared.

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Epson RC170 Betriebsanweisung Seite 173