Section 3.2 setting up tags, Ection, Etting – Spectrum Controls 2080sc-BAC User Manual
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Chapter 3: Configuring the Module
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User’s Manual Pub. 0300274-01 Rev. A.0
your MS/TP network you will need to determine
what MAC address to use that makes this device
unique on your network. You will need to
exercise care to avoid entering duplicate MAC
addresses in your device network.
Max Masters. In a token ring network, each
node is responsible for searching for the next
node and passing the token to it. Max Masters
is the maximum MAC address this module
searches for. For example, if this module’s MAC
address is 5 and the Max Master value is 20,
this module will poll MAC address from 6 to 20
for the next node. Enter the Max Masters
address. Default suggested value is 127 (range is
1 to 127).
Max Number of Frames. In a token ring
network, when a node receives a token, it needs
to pass the token to the next node in a timely
manner. Setting Max Number of Frames to 20
means when this module receives the token, it
can send out a maximum of 20 messages before
it has to pass the token to the next node. A good
starting value to enter is 20. If you have a very
busy network, you may need to reduce this
number to allow your network to function
optimally.
Baudrate. Select an MS/TP communication
baud rate (9600, 19200, 38400, or 76800):
Section 3.2 Setting Up Tags
You use this dialog to map PLC tags to BACnet objects. The 2080sc-BACnet
Communication Module supports BACnet AnalogInput (AI), AnalogOutput
(AO), BinaryInput (BI), and BinaryOutput (BO) objects. When you map a
BACnet object to a PLC tag, you should match the same or similar data types
(covered later in this chapter). For example, map PLC data type BOOL to
BACnet binary input or output objects. Other PLC data types can be mapped to
BACnet analog input or analog output objects.
If a BACnet object is AnalogInput, the module reads the mapped PLC
tag and sends the data back to the AI read property request.
If a BACnet object is AnalogOutput, the module writes the mapped PLC
tag when it receives an AO write property request.