FB_Injector

Implements specific functions of an injection axis (injector). Together with an FB_MeteringScrew, the combination of both axes results in an injection unit.

Internal functions:

Automatic injection sequence, consisting of:

Injection as a time-based PTP movement
Holding pressure switchover with HMI-configurable switchover criteria
Holding pressure phase with active process pressure control
Cooling phase with active position control

Automatic decompression after an injection or metering process (configurable)
Automatic response to metering commands from a metering screw

Syntax:

FUNCTION_BLOCK FB_Injector EXTENDS FB_PtpMotion

Properties

Name	Type	Access	Initial value	Description
Name	STRING	Get, Set	<SourceName>	Specifies the name of the class instance.
FB_Injector
BackPressureParams	I_PressureControlParams_PID	Get	<Local>	Parameter set for back pressure control with a connected metering screw.
DecompressionDone	BOOL	Get	FALSE	The decompression was carried out completely.
EnableBackPressure	BOOL	Get, Set	TRUE	Enables the back pressure control. As soon as the connected metering screw requests the back pressure control, it starts automatically.
HoldPressureParams	I_PressureControlParams_PID	Get	<Local>	Parameter set for holding pressure control.
InjectionDone	BOOL	Get	FALSE	The injection process has been completed.
InputPressure	I_InputBase	Get, Set	NULL	I/O element for reading in the pressure value to be controlled.
IsColling	BOOL	Get	FALSE	The injection process is currently in the cooling phase.
IsDecompressing	BOOL	Get	FALSE	A decompression command is currently being executed.
IsHolding	BOOL	Get	FALSE	The injection process is currently in the holding pressure phase.
IsInjecting	BOOL	Get	FALSE	The injection process is currently in the injection phase.
ReadyForMetering	BOOL	Get	FALSE	Feedback signal to a metering screw that the back pressure control has been activated.
FB_PtpMotion
ClampOnlyLastSeg	BOOL	Get, Set	TRUE	Clamping is only possible in the last segment.
PtpMoveFinished	BOOL	Get	FALSE	The PTP movement was executed successfully.
StackSegmentCount	BOOL	Get, Set	TRUE	Aborted segments are taken into account in the subsequent command.
UseClamping	BOOL	Get, Set	TRUE	Commanded PTP movements should use the set clamping.
UseManualSpeed	BOOL	Get, Set	FALSE	Commanded PTP movements should be executed at manual speed.
FB_Axis
Axis	I_AxisBase	Get	NULL	Interface to the assigned TF8560 axis.
Referencing	I_Referencing	Get	<Local>	Functions for referencing the axis.
FB_Motion
Motion	I_MotionBase	Get	NULL	Interface to the assigned TF8560 motion object.
ErrorAlarmTL	TcEventSeverity	Get, Set	Error (3)	Severity of the alarm that the axis triggers in the error state.
Specific	I_MotionSpecific	Get	-	Technology-specific functions/values
FB_BaseMd
MachineData	I_MdBaseContainer	Get	-	Interface for machine data handling.
FB_Base
BaseState	E_BaseState	Get	eNotHandled	Initialization state of the class instance.
Error	BOOL	Get	FALSE	Class is in an error state.
ResultMessage	I_AppMessage	Get	-	Access to the class-internal EventLogger.
[`PROTECTED`] _Name	STRING	Get	<SourceName>	`.Name` without leading 'fb'.

Methods

Name	Description
Reset()	Resets the error state of the class.
FB_Injector
Decompress(`bCommand`)	Starts/stops a relative PTP movement to decompress the current injection volume.
Inject(`bCommand`)	Starts/stops a PTP movement with holding pressure switchover switched on. As soon as the switchover conditions are met, the axis automatically switches to holding pressure control.
SetMetering(`iMetering`)	Assigns an associated metering screw to the injection axis.
FB_PtpMotion
ContinuePtp(`bCommand`)	Continues a paused `MovePtp()` command.
MovePtp()	Starts/stops a PTP movement with the parameterization from the HMI.
MoveToPoint()	Starts/stops a point movement with parameterization from the HMI.
ResetPtp()	Resets the saved progress of the `MovePtp()` command.
SetCams(`iCams`)	Assigns the cams that are to be used.
[`PROTECTED`] _UpdateCamMinMax()	Internal call to update the cam scale.
[`PROTECTED`] CmpSegPos(`iSeg1, iSeg2`)	Forms the difference of two segment positions.
FB_Axis
SetPosition(`bCommand`)	Setting the axis position with the `FB_AxisHmi.Setposition.`
FB_Motion
CheckAxisState()	Checks the current state of the axis.
FeedEnable(`bFeedEnableP, bFeedEnableN`)	Enable of a direction of movement.
JogNegative(`bCommand`)	Starts/stops a jog movement in negative direction.
JogPositive(`bCommand`)	Starts/stops a jog movement in positive direction.
Power(`bCommand`)	Switching on the drive control.
SetMotionRef(`iMotion`)	Assignment method for the TF8560 motion object.
FB_BaseMd
[`PROTECTED`] AddMdComp()	Adds a component of type I_MdComponent to the machine data container.
FB_Base
GetHMI()	Returns the assigned HMI object. Notice The method is not implemented in the `FB_Base` class. If the method is not overwritten by inheritance, a pseudo variable is always returned.
SetHMI(`ipBase`)	General assignment method for an `FB_BaseHmi` extending class as a local HMI. Notice The method is not implemented in the `FB_Base` class. If the method is not overridden by inheritance, it always fails.
[`PROTECTED`] _IsMyself(`iCmp`)	Identifies whether the transferred object corresponds to its own instance.
[`PROTECTED`] _QueryNamespace()	Extracts the first part of the instance path as an object namespace.
[`PROTECTED`] _QueryObjectName()	Extracts the last part of the instance path as the object name.

Procedure controlling methods (FB_AdaptableSequence)

Name	Description
PtpSeq()	Procedure for loading a PTP movement (extended).

Possible events

ID	Description	Alarm/Message
11	Object error state	Alarm
21	Command rejected	Alarm
710x	Injection error	Message
6000	Pressure control error	Message
200x	PTP command error	Message
10	Axis Errors	Alarm
20	Axis command rejected	Alarm

Machine data

Component	Description	Index range	Number of instances
FB_MdFileInfo	File information	0x0000 Fxxx	1
FB_MdPCtrlParams	Parameters for back pressure and holding pressure control.	0x0000 9xxx	2
FB_MdPtpMotion	Parameters for linear motion	0x0000 20xx	1
FB_MdAxis	Applicative axis parameters	0x0000 1xxx	1
FB_MdNc	NC specific parameters, only if `Specific.Nc.IsNc = TRUE`	0x0000 22xx	1 (0)
FB_MdTrafo	Transformation-specific parameters, only if `Specific.Trafo.IsTrafo = TRUE`	0x0000 23xx	1 (0)
FB_MdHoming	Parameters for homing the axis	0x0000 3xxx	1
FB_MdActuator	Actuator-specific parameters, only if `Specific.Actuator.IsActuator = TRUE`	0x0000 8xxx	1 (0)
FB_MdMotionParams	General parameters of a TF8560 motion object	0x0000 0xxx 0x0000 1xxx	1

Interfaces

Type	Description
I_Base	Standard interface on FB_Base.
I_Injector	Standard interface on FB_Injector.
I_PtpMotion	Standard interface on FB_PtpMotion.
I_Axis	Standard interface on FB_Axis.
I_Motion	Standard interface on FB_Motion
I_TwoTaskInterface	Runtime interface for two PLC tasks.
I_BaseMd	Standard interface on FB_BaseMd.
I_BaseDev	Covers all methods and properties of the base class.
I_Comparable	Enables comparisons via `_IsMyself()` or F_IsSameInstance().

Requirements

Development environment	Target platform	PLC libraries to include
TwinCAT 4026 >= v3.1.4026.19 TwinCAT 4024 >= v3.1.4024.71	PC or CX (x64, x86)	Tc3_PlasticBaseApplication (>= v12.14.0.0)

Further Information

PtpSeq()