Visara Master Console Center Scripting Guide Manuel d'utilisateur télécharger pdf (Page 94)

Chapter 5 Script Commands

Scripting Guide 94

DOUNIT

Syntax:

DOUNIT( %Port[, %Operation]) ==> %DOSwitch

Description:

Controls the device connected to a DO unit.

Action:

The switch on the specified DO unit port is opened or closed, thereby

changing the status of the connected equipment. This effectively

switches the equipment ON and OFF.

Parameters:

%Port. Numeric expression. The assigned power port number to

which the CPU is connected. Refer to Ports on page 24 for more

information.

%Operation. Numeric expression. Optional. ON closes the switch

and OFF opens the switch. If not specified, the DO switch setting

remains the same.

Returns:

Numeric value, the setting of the DO switch.

Value Meaning

0 OFF

1 ON

If the Operation parameter is specified, the return value is the old DO

switch setting value.

If the Operation parameter is not

specified, the return value is the

current DO switch setting value.

Note: This is not the current status of the device connected to the DO

unit—use DIUNIT to retrieve that value.

Notes:

1. Refer to Manifest Constants on page 42 for the constants reference

list.

2. This function is not commonly used.

Example:

DOUNIT( 4, ON)

%DOSwitch := DOUNIT( 4, ON)

%DOSwitch := DOUNIT( 4)

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Visara Master Console Center Scripting Guide Manuel d'utilisateur Page 94