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9.4 BACnet
The AcuLink 810 supports the BACnet protocol via the BACnet MS/TP and BACnet IP. The
gateway can also be configured as a BACnet gateway, as well as a BBMD (BACnet Broadcast
Messaging Device). The following section will provide an overview on configuring the BAC-
net protocol on the AcuLink 810 from the web interface.
9.4.1 BACnet MS/TP
In order to use the BACnet MS/TP, the protocol must be changed to BACnet for RS485 and/or
USB devices. This can be changed from the Interface Assignment page under the Protocols
tab.
NOTE: Users can have one port selected as Modbus and the other selected as BACnet.
From the Protocols page select BACnet . In the BACnet page under the Acquisitor tab users
can configure the BACnet MS/TP settings pertaining to RS485 and USB.
The following fields can be configured for BACnet MS/TP over both USB and RS485:
Client APDU Timeout: Is the time in seconds that the client will wait for a response after
sending a request. The default time is 3 seconds, and the range is 250 milliseconds to 6 sec-
onds.
Client APDU Retries: Is the number of time the client will retry a request when a response is
not received. The default setting is 2, the range is from 0-10.
MS/TP MAC Address: Is used to address devices on the BACnet network, the default address
is 1 and the range is 1-127.
Max Master: Defines the amount of allowable addresses (1-127) for the MS/TP master nodes
on the network, the default is 127 and the range is 1-127.
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Chapter 9: Protocols
V: 1.08 Revised: May 2020
67
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