FB_BA_StepCtrlAgg16

The function block FB_BA_StepCtrlAgg16 represents the higher-level control unit of a step sequence control of aggregates.

The control unit FB_BA_StepCtrlAgg16 can be used to sequentially switch on (stAgg01 > stAgg02 > stAgg03 > stAgg04 ... stAgg16) or switch off (stAgg16 > stAgg15 > stAgg14 > stAgg13 ... stAgg01) individual aggregates of a plant in a specific order.

Data exchange between the receive blocks of the step sequence control (FB_BA_StepBinary, FB_BA_StepMdlt) and the control unit FB_BA_StepCtrlAgg16 takes place via the data and command structures stAggxx.

Illustration

FUNCTION_BLOCK FB_BA_StepCtrlAgg16
VAR_INPUT
  bEnUpDown         : BOOL;
  nNumOfAgg         : UDINT;
END_VAR
VAR_OUTPUT
  nStep             : UDINT;
  bUp               : BOOL;
  bDown             : BOOL;
  nRemSecStepOn     : UDINT;
  nRemSecStepOff    : UDINT;
END_VAR
VAR_IN_OUT
  stAgg01-16        : ST_BA_Step;
END_VAR

Inputs

Name	Type	Description
bEnUpDown	BOOL	A rising edge means an increasing switch-on sequence of the aggregates from 1 to 16. FALSE means a decreasing switch-off sequence from the highest, active aggregate towards 0. 0 means that no aggregate of the step sequence control is active.
nNumOfAgg	UDINT	Input of the number of aggregates of the step sequence control. A limit only allows values from 1 - 16.

Name

Type

Description

bEnUpDown

BOOL

A rising edge means an increasing switch-on sequence of the aggregates from 1 to 16.

FALSE means a decreasing switch-off sequence from the highest, active aggregate towards 0.

0 means that no aggregate of the step sequence control is active.

nNumOfAgg

UDINT

Input of the number of aggregates of the step sequence control.

A limit only allows values from 1 - 16.

Outputs

Name	Type	Description
nStep	UDINT	Display in which step the step sequence control is located. 0 means that no aggregate of the step sequence control is active.
bUp	BOOL	Indicates that the sequence of the step sequence control is in the rising state.
bDown	BOOL	Indicates that the sequence of the step sequence control is in the falling state.
nRemSecStepUp	UDINT	Countdown switching to the next higher level [s].
nRemSecStepDown	UDINT	Countdown switching to the next lower level [s].

/ Inputs Outputs

Name	Type	Description
stAgg01-16	ST_BA_Step	Data and command structure between the individual sequence controllers FB_BA_SeqCtrl and the function block FB_BA_SequenceLinkBase.

Requirements

Development environment	Required PLC library
TwinCAT from v3.1.4024.22	Tc3_BA2 from v5.2.5.0