Contemporary Control Systems BASrouter Installation Guide (Firmware 2.x) - Manual (Page 18)

TD071200-0IK
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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