Contemporary-control-systems BASrouter Installation Guide (Firmware 2.x) Manual do Utilizador descarregar pdf (Página 18)

TD071200-0IK

6.4 MS/TP Parameters

6.4.1 MS/TP MAC (Default Value = 00)

This is the unique 8-bit (0–127) MAC address of the router’s

MS/TP port, in decimal. Lower MAC address numbers are

preferred with the default recommended. It is further

recommended that all other BACnet devices attached to the same

MS/TP network be assigned consecutive MAC addresses

beginning with 1 without allowing any gaps in addressing. Slave

devices may have MAC addresses of 128–254, but MAC address

255 is reserved.

6.4.2 MS/TP Network (Default Value = 2001)

This 16-bit decimal network number (1–65534) must be unique

for all BACnet networks within the BACnet internetwork. No

other networks, regardless of type, can have the same network

number. Do not use addresses 0 or 65535 since these are reserved.

6.4.3 Max Masters (Default Value = 127)

Only master nodes participate in the MS/TP token-passing

process. The highest master MAC address (in decimal) in the

MS/TP network is 127 and you should use 127 if you are unsure

of other MS/TP device addresses. Each MS/TP device should

use this same value. For a value in this field to be proper, it must

equal or exceed the highest MAC address for any master on the

network. Optimum performance occurs when this value:

1. equals the highest MAC address of any master, and

2. all masters use sequential MAC addresses starting with 1

Since many BACnet devices do not allow this parameter to be

changed, leave the BASRT-B at the default value.

6.4.4 Max Info Frames (Default Value = 100)

This is the maximum number of messages that can be routed

onto the MS/TP network by the router per token pass. Its range

is 1–100, and typical values are 20–40. Smaller values provide

less access to the MS/TP network from the BACnet/IP network

because they give native MS/TP messages higher priority than

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