BACnetWhoHas (FUN)ΒΆ

FUNCTION BACnetWhoHas : IEC_BACNET_STATUS

Sends a who-Has request.

Return: IEC_BACNET_STATUS

InOut:

Scope

Name

Type

Comment

Return

BACnetWhoHas

IEC_BACNET_STATUS

Input

pSourceAddress

POINTER TO IEC_BACNET_ADDRESS

If the BACnet application has only one device constructed and installed, this can be NULL. In this case the MAC address of this device will be used. Otherwise this shall be the MAC address returned on device object construction.

pDestinationAddress

POINTER TO IEC_BACNET_ADDRESS

This is the MAC address of the device to which the request should be sent.

filterMin

IEC_BACNET_INST_NUMBER

Argument limit the lower range of Device instance numbers which shall respond to this request. The range is omitted if the value is set to ::BACNET_NO_FILTER.

filterMax

IEC_BACNET_INST_NUMBER

Argument limit the upper range of Device instance numbers which shall respond to this request. The range is omitted if the value is set to ::BACNET_NO_FILTER.

objectSpec

POINTER TO IEC_BACNET_WHO_HAS_PARAM

This structure selects the object requested. The initiator may choose between requesting an object by its name or by its object identifier.