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The BACnet server from the FAQ BACnet: Cyclic Reading of a Property is used as the server here.

Requirements for the BACnet server

If you have followed the steps in the above linked FAQ exactly, then
- add a BACnet object of type BACnet Calendar to the BACnet Server in the device tree
- delete the exisiting BACnet Analog Value

Adapt the "PLC_PRG" as follows:

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Declaration

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VAR
	xAddCalendar		: BOOL;
	// API does not check dayOfweek!!! == >> DAY_OF_WEEK_UNSPECIFIED
	bacDate				: CmpBACnet.IEC_BACNET_DATE := (year := 2020, month := 2, dayOfMonth := 7, dayOfWeek := CmpBACnet.IEC_BACNET_DAY_OF_WEEK.DAY_OF_WEEK_FRIDAY);
	bacDate2			: CmpBACnet.IEC_BACNET_DATE := (year := 2020, month := 2, dayOfMonth := 14, dayOfWeek := CmpBACnet.IEC_BACNET_DAY_OF_WEEK.DAY_OF_WEEK_UNSPECIFIED);
	bacDateStartRange	: CmpBACnet.IEC_BACNET_DATE := (year := 2020, month := 2, dayOfMonth := 17, dayOfWeek := CmpBACnet.IEC_BACNET_DAY_OF_WEEK.DAY_OF_WEEK_UNSPECIFIED);
	bacDateEndRange		: CmpBACnet.IEC_BACNET_DATE := (year := 2020, month := 3, dayOfMonth := 25, dayOfWeek := CmpBACnet.IEC_BACNET_DAY_OF_WEEK.DAY_OF_WEEK_UNSPECIFIED);
	
	udiCnt				: UDINT;
	xMatchCurDay		: BOOL;
END_VAR

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Implementation

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BACnet_Calendar.GetEntryCount(count => udiCnt);
xMatchCurDay := BACnet_Calendar.PresentValue;
IF xAddCalendar THEN
	xAddCalendar := FALSE;
	BACnet_Calendar.AddBACnetDate(bacDat := bacDate);
	BACnet_Calendar.AddBACnetDate(bacDat := bacDate2);
	BACnet_Calendar.AddBACnetDateRange(bacStartDat := bacDateStartRange, bacEndDat := bacDateEndRange);
END_IF

Download the project to the controller and set the xAddSchedule variable to TRUE.
If successful, the entry count for the BACnet Calendar will increase by three.

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Requirements for the BACnet client

Create a "Standard project" and select CODESYS Control Win V3 as the device.
Define the target system by means of the network scan (see BACnet server).
Insert a "BACnet Server" object and rename it to "BACnet_Client"

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Open the Library Manager and add the following libraries
CmpBACnet

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Adapt the "PLC_PRG" as follows:

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Declaration

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theme	Confluence

VAR CONSTANT
	c_udiMaxEntries		: UDINT := 10;
	c_sDelimeter		: String := '.';
END_VAR
VAR
	fbReadProperty		: BACnet.BACnetClientReadProperty;
	xReadExecute		: BOOL;
	
	xInitDone 			: BOOL := FALSE;
	bacCalendarContents	: CmpBACnet.IEC_BACNET_PROPERTY_CONTENTS;
	udiIndex			: UDINT;
	
	asEntries			: ARRAY [0..c_udiMaxEntries] OF STRING;
	
	pbyRawBuffer		: POINTER TO BYTE;
	pCalenderEntry		: POINTER TO CmpBACnet.IEC_BACNET_CALENDAR_ENTRY;
	dat                 : CmpBACnet.IEC_BACNET_DATE;
	// Value is used if type is set to "date range"
	dateRange           : CmpBACnet.IEC_BACNET_DATE_RANGE;
	// Value is used if type is set to "week-n-day"
	weekNDay            : CmpBACnet.IEC_BACNET_WEEK_AND_DAY;

	sHelp				: STRING;
END_VAR

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Implementation

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theme	Confluence

IF NOT xInitDone THEN
	fbReadProperty.RegisterToServer(BACnet_Client);
	fbReadProperty(dwTargetDeviceNumber := 718,
    				objType := BACnet.CmpBACnet.IEC_BACNET_OBJECT_TYPE.OBJ_CALENDAR, objInst := 1,
    				propID := BACnet.CmpBACnet.IEC_BACNET_PROPERTY_ID.PROP_DATELIST,
					udiTimeOut := 5000000);
	xInitDone := TRUE;
ELSE
	fbReadProperty(xExecute := xReadExecute);
	IF fbReadProperty.xDone THEN
		xReadExecute := FALSE;
		bacCalendarContents := fbReadProperty.result;

		IF bacCalendarContents.tag = CmpBACnet.IEC_BACNET_DATA_TYPE.DATA_TYPE_CALENDAR_ENTRY THEN	
			pCalenderEntry := bacCalendarContents.buffer.pBuffer;
			FOR udiIndex := 0 TO bacCalendarContents.nElements -1 DO
				CASE pCalenderEntry[udiIndex].tag OF
					CmpBACnet.IEC_BACNET_CALENDAR_ENTRY_TYPE.CALENDAR_ENTRY_DATE:
						sHelp := CONCAT(BYTE_TO_STRING(pCalenderEntry[udiIndex].entry.dat.dayOfMonth), '.');
						sHelp := CONCAT(sHelp, TO_STRING(pCalenderEntry[udiIndex].entry.dat.month));
						sHelp := CONCAT(sHelp, '.');
						sHelp := CONCAT(sHelp, WORD_TO_STRING(pCalenderEntry[udiIndex].entry.dat.year));
						asEntries[udiIndex] := sHelp; 
						CmpBACnet.IEC_BACNET_CALENDAR_ENTRY_TYPE.CALENDAR_ENTRY_DATE_RANGE:
						sHelp := CONCAT(BYTE_TO_STRING(pCalenderEntry[udiIndex].entry.dateRange.startDate.dayOfMonth), '.');
						sHelp := CONCAT(sHelp, TO_STRING(pCalenderEntry[udiIndex].entry.dateRange.startDate.month));
						sHelp := CONCAT(sHelp, '.');
						sHelp := CONCAT(sHelp, WORD_TO_STRING(pCalenderEntry[udiIndex].entry.dateRange.startDate.year));
						sHelp := CONCAT(sHelp, ' ... ');
						sHelp := CONCAT(sHelp, BYTE_TO_STRING(pCalenderEntry[udiIndex].entry.dateRange.endDate.dayOfMonth));
						sHelp := CONCAT(sHelp, '.');
						sHelp := CONCAT(sHelp, TO_STRING(pCalenderEntry[udiIndex].entry.dateRange.endDate.month));
						sHelp := CONCAT(sHelp, '.');
						sHelp := CONCAT(sHelp, WORD_TO_STRING(pCalenderEntry[udiIndex].entry.dateRange.endDate.year));
						asEntries[udiIndex] := sHelp; 	
					CmpBACnet.IEC_BACNET_CALENDAR_ENTRY_TYPE.CALENDAR_ENTRY_WEEK_AND_DAY:
						// Do Something
					ELSE
						// Should never used == >> Implement ErrorHandling
				END_CASE
				IF pCalenderEntry[udiIndex].tag = CmpBACnet.IEC_BACNET_CALENDAR_ENTRY_TYPE.CALENDAR_ENTRY_DATE THEN
					dat := pCalenderEntry[udiIndex].entry.dat;
				END_IF
				IF pCalenderEntry[udiIndex].tag = CmpBACnet.IEC_BACNET_CALENDAR_ENTRY_TYPE.CALENDAR_ENTRY_DATE_RANGE THEN
					dateRange := pCalenderEntry[udiIndex].entry.dateRange;
				END_IF
			END_FOR
		END_IF
	END_IF
END_IF

Download the project to the controller and set the xReadExecute auf den Wert TRUE.
If successful, the values are transmitted from the server to the client.

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Requirements for the BACnet server

Requirements for the BACnet client