C.1 BACnet Configuration
Drives can be monitored and controlled by a controller on a Building Automation and Control network (BACnet) using RS-485
technology and MS-TP (Master-Slave/Token-Passing) protocol. The drives conform to the BACnet application specific
controller (B-ASC) device profile.
Up to 127 drives can communicate on a single BACnet MS-TP network. If more drives or BACnet devices are required, then
a BACnet router is required to allow another MS-TP network to be available with up to another 127 drives.
The BACnet node address is configurable by a parameter in the drive. This defines the physical address of the drive on the
MS-TP network. In addition, both the Device Object instance ID and the Device Object Name are configurable. These allow
the drive to have a virtual address, thus simplifying controller configuration.
Once the addressing is set, a controller can initiate communication to the drive. The drive will perform the specified function
and then send a response back to the controller. The drive will usually respond immediately, but may delay its response until
it gets the token for commands that may take extra local processing time.
BACnet
Workstation
Drive Drive Drive
MS-TP
BACnet over Ethernet
Router
Router
Drive Drive Drive
MS-TP
Figure C.1 Connecting Multiple Drives to a BACnet Workstation
C.1 BACnet Configuration
342
YASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual
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