DirectOutput

	Exclusive function for hydraulic axes This core function is only available for hydraulic axis types.

This core function is used to directly control the output of a hydraulic axis. There will be no monitoring of position limits.

This core function is a member of the group of statically-controlled core functions.

Syntax:

FUNCTION_BLOCK FB_DirectOutput EXTENDS FB_CorefunctionFeedback

Properties

Name	Type	Access	Description
InitState	BOOL	Get, Set	The core function is not completely and successfully initialized.
FB_DirectOutput
OutputReference	LREAL	Get, Set	This property defines the value that must be specified as OutPutValue to cause a full-scale output to the controlled device.
OutputValue	LREAL	Get, Set	This property is used to define the output to the device. OutputReference as a scaling here.
Ramptime	LREAL	Get, Set	RampTime is used to define the time for ramping from zero to the full-scale value.
FB_CorefunctionFeedback
AbortedState	BOOL	Get, Set	Signals the abort of a command by another Corefunction.
BusyState	BOOL	Get, Set	Signals the active execution of a command.
DoneState	BOOL	Get, Set	Signals the successful execution of a command.
IdleState	BOOL	Get, Set	The Corefunction is ready for operation and commandable.
IsCommanded	BOOL	Get	Signals the pending of a command.
FB_Corefunction
FailedState	BOOL	Get, Set	If IsActivated is TRUE at the same time: Signals the failure of an accepted command. If IsActivated is FALSE at the same time: Signals the rejection of a command.
HasFeedback	BOOL	Get	The core function has responded to a pending command.
IsActivated	BOOL	Get	The core function has an accepted command pending.
IsLocalCmd	BOOL	Get	Signals that the axis is assigned with a command of this core function.
ReadyState	BOOL	Get, Set	The Corefunction is ready for operation, but is not commandable at this time. Possible reasons are: - The axis is not enabled. - Another Corefunction is active. - The Corefunction does not support any commands.

	The output value is influenced by RampTime Any change in the output whose amount is less than the full-scale value requires a proportional part of RampTime.

Methods

Name	Description
[`INTERN`] Cyclic()	This method is called cyclically by the axis.
FB_DirectOutput
DoActivate()	This method enables and disables the direct output.

Interfaces

Type	Description
I_Corefunction	Standard interface on FB_Corefunction.
I_DirectOutput	Standard interface on FB_DirectOutput.
I_CorefunctionFeedback	Standard interface on FB_CorefunctionFeedback.

Example:

// Get specific interface I_AxisHydraulicBase from general interface I_AxisBase
IF __QUERYINTERFACE(iAxisBase, iAxisHydraulic) THEN
    
    IF bDirectOutput THEN
        
        // in this example, the reference is the electrical unit used
        iAxisHydraulic.DirectOutput.OutputReference := 10.0;    // [V] 
        iAxisHydraulic.DirectOutput.Ramptime := 1.0;            // [s]
        iAxisHydraulic.DirectOutput.DoActivate(TRUE);
        
        // the set value will switch after 2 seconds
        fbTon.Pt := T#2S;
        IF fbTon.Q THEN
            iAxisHydraulic.DirectOutput.OutputValue := 3.0;    // [V]
        ELSE
            iAxisHydraulic.DirectOutput.OutputValue := 1.0;    // [V]
        END_IF
        
    ELSIF iAxisHydraulic.DirectOutput.IsCommanded THEN
        
        iAxisHydraulic.DirectOutput.DoActivate(FALSE);
    END_IF
    
    fbTon.In := bDirectOutput;
    fbTon();

ELSE
    // interface is not set to an instance of FB_AxisHydraulicBase
    bIncompatible := TRUE;
END_IF

Requirements

Development environment	Target platform	PLC libraries to include
TwinCAT v3.1.4024.35	PC or CX (x64, x86)	Tc3_PlasticFunctions v3.12.4.26 or higher Tc3_PlasticHydraulic v3.12.4.26 or higher

Development environment

Target platform

PLC libraries to include

TwinCAT v3.1.4024.35

PC or CX (x64, x86)

Tc3_PlasticFunctions v3.12.4.26 or higher

Tc3_PlasticHydraulic v3.12.4.26 or higher

Further Information

DoActivate