Rockwell Automation 20-750-BNETIP BACnet/IP Option Module - Manual (Page 38)

38 Rockwell Automation Publication 750COM-UM005B-EN-P - June 2014
Chapter 4 Using BACnet Services and Objects
The table below provides a brief description of these services.
Table 2 - BACnet Services Supported by the Option Module
Understanding BACnet
Objects
BACnet devices are controlled and monitored by the use of several objects. The
BACnet controller performs read and write services to these objects, and the
option module translates the data between these objects and the PowerFlex 750-
Series drive.
When a read or write service occurs to a specific object, data in that object is
refreshed from or transferred to the drive.
These are the BACnet object types supported by the option module:
• Analog Input (AI)
• Analog Output (AO)
• Analog Value (AV)
• Binary Input (BI)
• Binary Output (BO)
• Binary Value (BV)
Property Type Name Description
Object Access
Services
Read Property
Service
This service is used to read parameter values represented
by BACnet objects for the PowerFlex 750-Series drive or
option module.
Write Property
Service
This service is used to write values to parameters
represented by BACnet objects for the PowerFlex 750-
Series drive or option module.
Read Property
Multiple Service
This service is used to read multiple parameter values
represented by BACnet objects for the PowerFlex 750-
Series drive or option module.
Write Property
Multiple Service
This service is used to write values to multiple
parameters represented by BACnet objects for the
PowerFlex 750-Series drive or option module.
Remote Device
Management
Services
Who-Has and I-Have
Services
Who-Has service is a request to identify an object
specified by the object identifier or object name.
I-Have service is a response to respond to Who-Has
service requests.
Who-Is and I-Am
Services
Who-Is service is used to determine the device object
identifier, the network address, or both, for all BACnet
devices on the network.
I-Am service is used to respond to Who-Is service
requests. It is independent to Who-Is service and may be
issued at any time. It is also used to broadcast the
existence of the option module, or all BACnet devices on
the network.