FB_BA_SubTrend

The function block allows to subscribe to a trend object.

Inheritance hierarchy

FB_BA_Base

FB_BA_Subscriber

Syntax

FUNCTION_BLOCK FB_BA_SubTrend EXTENDS FB_BA_Subscriber
VAR_INPUT
  sTarget                   : T_BA_MedString;
  tReadInterval             : TIME;
  tReadTolerance            : TIME;
  bClearOnReadError         : BOOL;
END_VAR

VAR_OUTPUT
  bError                    : BOOL;
  bEvent                    : BOOL;
  nRecordCount              : UDINT;
  nTotalRecordCount         : UDINT;
END_VAR

Inputs

Name	Type	Description
sTarget	T_BA_MedString	AMS NetId of the Publisher.
tReadInterval	TIME	Read interval [s].
tReadTolerance	TIME	Waiting time until a pending error is output [ms].
bClearOnReadError	BOOL	If TRUE, the data is deleted if an error occurs.

Outputs

Name	Type	Description
bError	BOOL	Displays the current error state of the subscription. Details can be found in the corresponding error message in the event of an error.
bEvent	BOOL	The variable signals an abnormal event of an object. The type of event, e.g. an alarm, a maintenance message, etc., is described within the event class associated with the object.
nRecordCount	UDINT	Number of records.
nTotalRecordCount	UDINT	Absolute number of records.

Properties

Name	Type	Access	Description
Enable	BOOL	Get, Set	Enable of the subscription.

Methods

Name	Description
GetData	Contains the subscribed data.

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.35	Tc3_XBA from v5.3.0.0

Further Information

GetData