BAC_BO_01

Functional description

The template determines the current switch value from several prioritized setpoints (priority matrix, inputs of the template) and transmits the switch value to a Bus Terminal (see I/O link).
On the one hand, the template records the manual intervention by means of a digital input LocSwi and the feedback of the actuator via the two inputs bEnFdb/bFdb of the template.
The template is used to output and monitor switching commands or pulses (e.g. 1-stage motors/pumps, dampers).

Interface

Block diagram

VAR_INPUT

bEnSfty    : BOOL;
bValSfty   : BOOL;
bEnDst     : BOOL;
bValDst    : BOOL;
bEnLoc     : BOOL;
bValLoc    : BOOL;
bEnPgm     : BOOL;
bValPgm    : BOOL;

bEnSfty: Safety priority enable

bValSfty: Digital value safety priority

bEnDst: Enable fault priority.

bValDst: Digital value fault priority.

bEnLoc: Enable priority manual intervention

bValLoc: Digital value priority manual intervention

bEnPgm: Enable program priority

bValPgm: Digital value program priority

VAR_OUTPUT

bPrVal        : BOOL;
udiActvPrio   : UDINT;
bStaOverrd    : BOOL;

bPrVal: current value of the binary output object.

udiActvPrio: display of the current priority of the BO object

bStaOverrd: indicates that the BO object is overridden by a local mechanism, see LocSwi

VAR CONSTANT

PLT_NUM    : BYTE := 1;

PLT_NUM: all alarms and events of all plant components within a controller are included in a global alarm and event list. The assignment of events and alarms to a plant is defined by the assignment of a PLT_NUM plant number.
The recording and processing of an alarm from an aggregate or a device takes place within the templates by means of the alarm function block FB_BA_Alarm.
The evaluation of the alarms of a plant, e.g. for the generation of a collective message or for plant shutdown in case of relevant faults, takes place within the template BAC_PltAlm_01 by means of the function block FB_BA_AlarmPlt.
The evaluation of different plant events within the templates of a plant, takes place within the template BAC_PltComnMsg_01 by means of the function block FB_BA_ComnMsg.

Important! The assignment and evaluation of the alarms and events of a plant can only be done correctly if all templates of a plant have the same plant number!

The plant number can be assigned in the Project Builder in the parameter menu for the templates or via a column in the Excel import.

Program description

IO linking

In the XML description associated with the template, variables with the ID Input or Output are declared in the Parameter section. These parameters can be linked with the process image of the input and output level in the PLC in the Project Builder or via the Excel import interface.

IO linking

Variables for linking with the terminals

Version history