FB_DetectOnlineChange - General Information

Overview

Type:	Function Block
Available as of:	V1.0.4.0
Inherits from:	-
Implemented:	-

Task

A function block that checks whether a change has been executed since the last log in and whether the change should be transferred to the PacDrive controller using the online-change function.

Description

The function block checks via a parameter of the PacDrive controller if an online change took place. The parameter is a counter and is incremented after every online change.

During initialization, the POU always reports that an online change has taken place (q_xChange := TRUE).

This function block can be used to update pointers when required, for example.

Interface

Input	Data type	Description
i_xEnable	BOOL	A rising edge FALSE -> TRUE activates the POU, a falling edge TRUE -> FALSE deactivates the POU. A deactivated POU does not execute any actions.
i_xDetect	BOOL	TRUE: The system is checked for an online change.

Input

Data type

Description

i_xEnable

BOOL

A rising edge FALSE -> TRUE activates the POU, a falling edge TRUE -> FALSE deactivates the POU.

A deactivated POU does not execute any actions.

i_xDetect

BOOL

TRUE: The system is checked for an online change.

Output	Data type	Description
q_xActive	BOOL	TRUE: The POU is active and has to be executed further. FALSE: The POU is inactive.
q_xReady	BOOL	TRUE: The POU is ready to operate and accepts user commands. FALSE: the POU is not ready to operate and does not accept user commands.
q_etDiag	GD.ET_Diag	General, library-independent statement on the diagnostic. A value not equal to ET_Diag.Ok corresponds to an error message.
q_etDiagExt	ET_DiagExt	POU-specific output on the diagnostic. q_etDiag = ET_Diag.Ok -> Status message q_etDiag <> ET_Diag.Ok -> Error message
q_sMsg	STRING[80]	Event-triggered message which gives more detailed information on the diagnostic state.
q_xChange	BOOL	TRUE: An online change was performed between the last call-up of the POUs and this call-up of the POUs. FALSE: There was no online change.

Diagnostic Messages

q_etDiag	q_etDiagExt	Enumeration value	Description
OK	Detecting	52	Detect
OK	Disabled	22	Diagnostic message disabled
OK	WaitForDetect	51	Waiting for Detect.
ControllerConditionInvalid	ControllerInvalid	6	The controller is invalid.

ControllerInvalid

Enumeration name:	ControllerInvalid
Enumeration value:	6
Description:	The controller is invalid.

Issue	Cause	Solution
-	The controller does not provide the required conditions.	For more details, see q_sMsg output

Detecting

Enumeration name:	Detecting
Enumeration value:	52
Description:	Detect

The controller is checked for online changes.

Disabled

Enumeration name:	Disabled
Enumeration value:	22
Description:	Diagnostic message disabled

The function block is disabled and executes no actions whatsoever. i_xEnable and q_xActive are set to FALSE

WaitForDetect

Enumeration name:	WaitForDetect
Enumeration value:	51
Description:	Waiting for Detect.

The POU is enabled and is expecting a signal at the i_xDetect input.