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nuaire.co.uk 029 2085 8400 04. 01. 17. Leaflet Number 671781
Installation Guide ESCO-IPN Portable BACnet Multi-Network Router
Device Parameter
Device Instance (Default Value = 0)
The router’s device instance is a 22-bit value (0–4,194,302). Do not use
4,194,303 which is reserved by BACnet. Each BACnet device within the same
BACnet internetwork must have a unique device instance. One must be assigned
to the ESCO-IPN.
BACnet Ethernet
Ethernet Network (Default Value = 0 —disables BACnet Ethernet)
Most BACnet communication that is carried by Ethernet uses the BACnet/IP
protocol. However, there are still instances in which the older BACnet Ethernet
protocol (ISO 8802-3) is found. The ESCO-IPN allows these two protocols to
communicate.
BACnet Ethernet uses Ethernet MAC addresses for station addressing — unlike
BACnet/IP which addresses messages by means of Internet Protocol (IP)
addresses. Each Ethernet MAC address (often called the physical address) is
unique to the Ethernet network adapter. It is permanently embedded into the
adapter during manufacture and cannot be changed. It is composed of six two-
digit hexadecimal numbers (00–FF). An example of an Ethernet MAC address is:
00-08-A1-10-BD-EB
Each Ethernet network adapter has the ability to store an IP address that is
changeable. This IP address is typically represented as four decimal values (each
is 0–255) separated by dots. Often called the dotted quad format, an example is:
192.168.92.1
IMPORTANT
Although they may share the same Ethernet physical network, BACnet
Ethernet devices and BACnet/IP devices must have their own unique network
number and these two networks cannot communicate unless their messages
pass through a router. These network numbers must be in the range of
1–65534 (0 and 65535 are reserved). If the BACnet Ethernet network value is
left at its default value of 0, the BACnet Ethernet function within the ESCO-
IPN will be disabled. To prevent message loops, a subnet must have only one
router enabled for BACnet Ethernet.
BACnet/IP Parameters
BACnet/IP UDP Port (Default Value = 0xBAC0)
This 16-bit hex value (BAC0–BACF) is set to BAC0 by default. Usually, this
default value should not be changed. In a typical installation, each ESCO-IPN
will be assigned the same UDP port.
BACnet/IP Network (Default Value = 1)
The BACnet/IP network number is a 16-bit value (1–65534). Each network within
the BACnet internetwork must have a unique number. This includes the BACnet/
IP and MS/TP sides of the ESCO-IPN. Do not use addresses 0 or 65535 since
these addresses are reserved.
IP Address (Default Value = 192.168.92.68)
The IP address of the router can be 0.0.0.1–255.255.255.254. A private address is
usually assigned to the ESCO-IPN.
IP Subnet (Default Value = 24)
This value (0–30 in the “slash” notation) is the number of bits with a “1” in
the mask. The default value of 24 corresponds to 255.255.255.0 in the dotted
decimal format. All devices on the same subnet which communicate via BACnet/
IP should use the same subnet mask.
IP Gateway (Default Value = 192.168.92.1)
The default gateway for the IP stack is a dotted decimal number in the range of
0.0.0.0–255.255.255.254. This will be the IP address of your local IP router —if
one exists.
MS/TP Parameters
MS/TP MAC (Default Value = 00)
This is the 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.
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 addresses are reserved.
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
Since many BACnet devices do not allow this parameter to be changed, leave
the ESCO-IPN at the default value.
Max Info Frames (Default Value = 40)
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 those passed by the router from BACnet/IP. The default value usually
provides good performance.
MS/TP Baud Rate (Default Value = 9600)
The baud rate of the MS/TP network can be 9600, 19200, 38400 or 76800 bps.
All MS/TP devices on the same MS/TP network must use the same baud rate.
On power up the router checks for other masters; if finding none, it begins token
passing — at which point autobauding devices will adjust to the router’s baud
rate.
MS/TPTolerance (Default Selection = Strict)
This setting determines the degree to which interoperability with devices is
successful. The Lenient option is less efficient for traffic flow but optimises
interoperability. A slight improvement in performance will be realised by
selecting the Strict setting.
