FB_BA_Aggregate

The aggregate function block represents a receive block of a step sequence controller.

It communicates via the data and command structure stAggregate with the higher-level plant control unit of the step sequence control FB_BA_PlantControl.

The function block is used to evaluate the structure stAggregate. The result is output at the inputs and outputs of the function block.

Syntax

FUNCTION_BLOCK FB_BA_Aggregate
VAR_INPUT
  bFdbUp             : BOOL;
  bFdbDown           : BOOL;
END_VAR
VAR_OUTPUT
  arrPriorities      : ARRAY [0..BA_Param.nMaxPriority] OF BOOL;
  nPrio              : UDINT;
  bPriorityActive    : BOOL; 
  bValue             : BOOL;
  nValue             : UDINT;
  fValue             : REAL;
END_VAR
VAR_IN_OUT
  stAggregate        : ST_BA_Aggregate;
END_VAR

Inputs

Name	Type	Description
bFdbUp	BOOL	A feedback from the aggregate is applied to the input. It is used within the step sequence control to switch up to the next higher step. The feedback is transmitted to the plant control unit via the data and command structure stAggregate.
bFdbDown	BOOL	A feedback from the aggregate is applied to the input. It is used to switch down to the next lower step. The feedback is transmitted to the plant control unit via the data and command structure stAggregate.

Name

Type

Description

bFdbUp

BOOL

A feedback from the aggregate is applied to the input. It is used within the step sequence control to switch up to the next higher step.

The feedback is transmitted to the plant control unit via the data and command structure stAggregate.

bFdbDown

BOOL

A feedback from the aggregate is applied to the input. It is used to switch down to the next lower step.

The feedback is transmitted to the plant control unit via the data and command structure stAggregate.

Outputs

Name	Type	Description
arrPriorities	BOOL	The binary array outputs the enables of the priorities. Only one priority is active at a time. nPrio indicates which one it is.
nPrio	UDINT	Indicates which priority is active.
bPriorityActive	BOOL	One priority is enabled.
bValue	BOOL	Binary switching value for the aggregate.
nValue	UDINT	Multi-stage switching value for the aggregate.
fValue	REAL	Analog control value for the aggregate.

/ Inputs Outputs

Name	Type	Description
stAggregate	ST_BA_Aggregate	The aggregate structure is used for bidirectional communication between the connected aggregate FB_BA_Aggregate and the plant control FB_BA_PlantControl.

Name

Type

Description

stAggregate

ST_BA_Aggregate

The aggregate structure is used for bidirectional communication between the connected aggregate FB_BA_Aggregate and the plant control FB_BA_PlantControl.

FB_BA_Aggregate 6:

Properties

Name	Type	Access	Description
Down	BOOL	Get	Indicates that the sequence of the step sequence control is in the falling state.
OpMode	UDINT	Get	Displays the current operation mode of the plant control.
Prio	UDINT	Get	Indicates which priority is the active one in the plant control.
Step	UDINT	Get	Indicates the current step of the plant control.
Up	BOOL	Get	Indicates that the sequence of the step sequence control is in the rising state.

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.55	Tc3_BA2 from v5.3.19.0