BACnetClientSubscribeCOVProperty (FB)

FUNCTION_BLOCK PUBLIC FINAL BACnetClientSubscribeCOVProperty EXTENDS BACnetClientBase

Common Behaviour Model conform (ETrigA) FB to execute a Subscribe-COV-Property-Request in the BACnet-Network. If execution completed successfully and xDone is TRUE, the COV-Property-Subscription was successful. In any other case eStatus and errorResult may hold additional information of what failed.

InOut:

Scope

Name

Type

Initial

Comment

Inherited from

Input

xExecute

BOOL
Rising edge: Starts defined operation
FALSE: Resets the defined operation after ready condition was reached

ETrigATo

xAbort

BOOL

TRUE: Aborts the operation

ETrigATo

udiTimeOut

UDINT

Max. operating time for executing [µs], 0: No operating time limit

ETrigATo

Output

xDone

BOOL

TRUE: Ready condition reached

ETrigATo

xBusy

BOOL

TRUE: Operation is running

ETrigATo

xError

BOOL

TRUE: Error condition reached

ETrigATo

xAborted

BOOL

TRUE: Abort condition reached

ETrigATo

Input

dwTargetDeviceNumber

DWORD

The device number of the targeted device in the BACnet- Network.

BACnetClientBase

pTargetDeviceAddress

POINTER TO CmpBACnet.IEC_BACNET_ADDRESS

0

Optional: The device address of the targeted device in the BACnet-Network. If an adress is given the given device number is ignored.

BACnetClientBase

pAPDUParams

POINTER TO CmpBACnet.IEC_BACNET_APDU_PROPERTIES

0

A pointer to the structure which contains a set of APDU properties to control the timing and size of transmitted frames for this request. It temporarily overwrites the global APDU settings made in the source device from which this request is sent and which parameters would control this request if this pointer is NULL.

BACnetClientBase

Output

eStatus

CmpBACnet.IEC_BACNET_STATUS

CmpBACnet.IEC_BACNET_STATUS.BACNET_STATUS_OK

If an error occured, the error state.

BACnetClientBase

errorResult

CmpBACnet.IEC_BACNET_ERROR

STRUCT(tag := CmpBACnet.IEC_BACNET_FAILURE_TYPE._FAILURE_MAX_SIZE)

If an error occured (this means eStatus <> BACNET_STATUS_OK), whereas the sent BACnet-Request was answered with an specific error information, the latter is contained in this structure.

BACnetClientBase

iState

DINT

0
The State in which the FB is during execution:

  • 0: No execution, resetted state

  • 1: Searching for the Target-Device and a valid address for it

  • 2: Sending the BACnet-Request into the network

  • 3: Waiting for the answer (if there is one) to the BACnet-Request made in 2

  • 4: Finishing the call, setting of the output variables

BACnetClientBase

Input

xSubscribe

BOOL

TRUE

Describes whether the COV subsciption shall be made/renewed or deleted.

xIssueConfirmedNotifications

BOOL

Describes whether confirmed or unconfirmed COV notification shall be send by the COV-Provider.

lifetime

CmpBACnet.IEC_BACNET_UNSIGNED

Lifetime of the COV-Subscription in seconds. Use 0 for infinite lifetime.

monitoredObjType

CmpBACnet.IEC_BACNET_OBJECT_TYPE

Object type of the monitored object under the targeted device.

monitoredObjInst

CmpBACnet.IEC_BACNET_DWORD

Object instance of the monitored object under the targeted device.

monitoredPropID

CmpBACnet.IEC_BACNET_PROPERTY_ID

Property-ID of the property under the targeted object the COV subcription shall be made for.

monitoredPropIndex

CmpBACnet.IEC_BACNET_ARRAY_INDEX

Element index in the targeted property for which the COV subscription shall be made for.

covIncrement

CmpBACnet.IEC_BACNET_REAL

The COV increment the COV subscription shall use.

pValueSrc

POINTER TO CmpBACnet.IEC_BACNET_AUDIT_VALUE_SOURCE

0

Optional: A pointer to a data structure which contains the value source information for generating an logged and/or reported audit notification for this initiated request. If generating an logged and/or reported audit notification for this request is not intended, pValueSrc can be set to 0.

Properties:

Methods:

Structure: