Adjusting Bacnet Ms/Tp Properties Using An Equipment Touch - Carrier RTU Open v5 Integration Manual

Communications wiring
Set the remaining DIP switches as follows:
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BACnet MS/TP DIP switch settings
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Off
The following example shows the DIP switches set for 76.8k (Carrier default), and BACnet MS/TP.
Connect the BACnet MS/TP network to the controller's J19 Network Comm port. Connect to Net+, Net-, and
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SHLD.
Wire specifications
A dedicated 22 AWG shielded twisted pair wire (EIA 485)
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Maximum wire length 2000 feet (610 meters) or 32 nodes
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Devices should be daisy-chained and not star-wired
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Attach the drain/shield wire to both ends of the network segment and through every controller
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NOTE Use the same polarity throughout the network segment.
Turn on the RTU Open's power.
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Adjusting BACnet MS/TP properties using an Equipment Touch

You may need to adjust the following BACnet MS/TP protocol timing settings using the Equipment Touch.
Max Masters - defines the highest MS/TP Master MAC address on the MS/TP network.
For example, if there are 3 master nodes on an MS/TP network, and their MAC addresses are 1, 8, and 16, then
Max Masters would be set to 16 (since this is the highest MS/TP MAC address on the network).
This property optimizes MS/TP network communications by preventing token passes and "poll for master"
requests to non-existent Master nodes.
RTU Open v5
Integration Guide
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