BAC_PltComnMsg_01

Functional description

The template BAC_PltComnMsg_01 collects all event messages of the BACnet objects within a plant. For display of these messages at the management and control level (OWS) or at a local operator display, the main messages are linked with a BV object.

Interface

BAC_PltComnMsg_01 1:

Plant

Block diagram 01

Block diagram 02

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

Instance	Type	Task
ComnMsg	FB_BA_ComnMsg	The ComnMsg function block collects event messages from the BACnet objects of a plant. To display these collective messages, some information of the ComnMsg function block is linked to a BV object. The transfer of the messages from the BACnet objects to the message function block ComnMsg is done by means of a one-dimensional array of the structure ST_BA_ComMsg. Each plant reserves an element of this array via the plant number. The array for collecting the messages from the BACnet objects within a controller is declared globally in the folder Global_Variables_General. It is important that the message collector FB_BA_ComnMsg and the BACnet objects within the templates of a plant are set to the same plant number! VAR CONSTANT PLT_NUM : BYTE := 1; (Anlagennummer//Plant Number) END_VAR The plant number can be set in the project builder in the parameter menu of the templates or by a column within the Excel import.
InAlm	FB_BACnetBVDisplay	Collective message of the status flag of the BACnet objects
Flt	FB_BACnetBVDisplay	Collective message the BACnet Fault objects
ManCtrlSw	FB_BACnetBVDisplay	Collective message manual override of one of the BACnet objects is on Prio 8
ManCtrlSwi	FB_BACnetBVDisplay	Local mechanical priority operation is enabled at one of the BACnet output objects
OoServ	FB_BACnetBVDisplay	One of the BACnet objects in the plant is OutOfService
Err	FB_BACnetBVDisplay	One of the BACnet objects is faulty, e.g. ADS error

Version history

Version number	Comments
1.0.1	First release