Mstp Port tab
These fields configure the BACnet/Mstp link layer used by the controller, providing that the
Enabled property (in BACnet Network tab) is set to true.
Figure 196. Mstp Port tab
To access this view, click , followed by clicking the Mstp Port tab.
Properties
In addition to the standard properties (Enabled, Status, and Fault Cause) these properties support the BACnet Mstp Port.
| Property | Value | Description |
|---|---|---|
| Network Number | number from -1 to the BACnet network number for the network segment to which you are connecting | Sets the number of the network. If this is an existing BACnet installation, make sure to use the same network number already
in use. If this a new BACnet installation, choose this number (for example: 3)
|
| Port Name | text | Typically, you leave the Mstp Address at 0 (the default), and verify that no other MS/TP device on the trunk is addressed the same. If there is ever a lost token, the device with the lowest MAC address regenerates the token (and, in this case, the station). |
| Baud Rate | drop-down list | Selects the baud rate. |
| Mstp Address | number, in decimal, with a valid range from 0 (default) to 127 | Sets the Mstp address to a unique BACnet MAC address on that MSTP trunk. Each BACnet device on the MS/TP network segment must have a unique MAC address. |
| Max Master | number, in decimal, with a valid range from 0 (default) to 127 | Sets the maximum master device to the lowest known master device on the network, with possible room for expansion if needed. |
| Max Info Frames | number up to 100, defaults to 20 | Specifies how many messages are sent before passing the token. Increasing this value to 100 improves performance in some cases. |