PressureControl.Supervisor

This Corefunction organizes the pressure control of the axis and provides the infrastructure interfaces. This is reflected in an interface for a pressure sensor and the switching function for pressure switchover.

	Pressure switchover only for certain core functions The pressure switchover can only be carried out with the following core functions: PTP

Syntax:

FUNCTION_BLOCK FB_ProcessSupervisor EXTENDS FB_Corefunction

Properties

Name	Type	Access	Description
InitState	BOOL	Get, Set	The core function is not completely and successfully initialized.
FB_ProcessSupervisor
BadSwitchOver	BOOL	Get	Identifies whether a pressure switchover occurred due to safety conditions.
ExternalMode	BOOL	Get	TRUE as soon as an external ProcessHandler has been assigned.
Filter	I_Filter	Get, Set	Interface for a filter to be applied to the actual pressure value.
MinCushion	LREAL	Get, Set	Minimum distance that the axis must travel before the pressure-based switchover can be triggered.
PositionLimit	LREAL	Get, Set	Safety-limiting position from which a `BadSwitchOver` is identified.
PressureLimit	LREAL	Get, Set	Safety-limiting pressure above which a `BadSwitchOver` is identified.
PressureThreshold	LREAL	Get, Set	Pressure threshold value above which a switchover should take place. Requirement is `SwitchOnPressure`
Sensor	I_InputBase	Get, Set	Interface for an actual pressure value sensor
SwitchOnPressure	BOOL	Get, Set	Activates the switchover based on a pressure threshold value.
SwitchOnTime	BOOL	Get, Set	Activates the switchover based on the time of the previous command.
SwitchOnTravel	BOOL	Get, Set	Activates the switchover based on the value set by a previous command.
SwitchOver	BOOL	Get	If TRUE, the Supervisor has triggered the pressure switchover.
Timeout	LREAL	Get, Set	Safety-limiting time from which a `BadSwitchOver` is identified.
TimeThreshold	LREAL	Get, Set	Time threshold from which a switchover should take place. Requirement is `SwitchOnTime`
TravelThreshold	LREAL	Get, Set	Threshold value from which a switchover should take place. Requirement is `SwitchOnTravel`
ValueOffset	LREAL	Get, Set	Zero offset shift for the read actual pressure value.
ValueWeighting	LREAL	Get, Set	Weighting factor for the maximum value of the read actual pressure value.
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.

Methods

Name	Description
GetExternal()	Returns the connected external supervisor (implements I_ProcessHandler). Notice Can return `NULL` if not previously assigned.
SetExternal(`iHandler`)	Assigns an external supervisor (implements I_ProcessHandler). If `0` is transferred, the internal supervisor is reactivated.

Interfaces

Type	Description
I_Corefunction	Standard interface on FB_Corefunction.
I_ProcessSupervisor	Standard interface on FB_ProcessSupervisor.

Example:

iAxisBase.PressureControl.Supervisor.Sensor := fbInputMainExtruderMeltPressure;
iAxisBase.PressureControl.Supervisor.ValueOffset := 0.0;
iAxisBase.PressureControl.Supervisor.ValueWeighting := 200.0;    // bar

Requirements

Development Environment	Target platform	PLC libraries to include
TwinCAT v3.1.4024.66	PC or CX (x64, x86)	Tc3_PlasticFunctions (>= v12.10.0.0)

Further Information

I_ProcessHandler