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Installation and Operations Guide

Initial firmware and operator workstation setup

Table 10 BACne t/IP se ttings in the VLX/ACM-VLX

Fie ld Value s Re marks

A. IP Enabled Y | N Y = Enables IP s upport. N = Disable s IP s upport. If the VLX is on an Ethe rne t LAN

but doe s not us e IP, e ns ure that IP Enabled = N, or that IP Addre s s =

000.000.000.000. This pre ve nts the VLX from se nding any IP mes s age s .

B. IP Frame Type DIX | 802.2 The Ethe rnet frame type us e d for incoming and outbound IP trans miss ions . DIX is

more common. The primary differe nce be twee n frame type s is the LLC he ader.

DIX = The VLX ge ne rates and routes DIX (Ethe rne t II) frame s . 802.2 = The VLX

ge ne rates and route s 802.2 (als o known as 802.3/802.2-not RAW Ethe rne t)

fra me s .

C. Re as s e mbly

Time out

1-300 The fragme nt re ass e mbly time -out, in se conds . De fault is 120.

D. Maximum MTU 90-1500 The Maximum Transmis s ion Unit (MTU) in byte s . Default is 1500 (typical for

Ethe rne t ne tworks).

E. Time to Live 001-255 Se ts the initial Time to Live (TTL) value for IP packe ts s e nt from this de vice . TTL

enume rate s the numbe r of hops (the numbe r of forwarding route rs) the packe t is

allowed to pas s be tween source and de s tination. This preve nts looping packe ts

from cras hing route rs and saturating e ntire links or ne tworks . De fault is 64.

F. Type of S e rvice 0, 1, 2, 4, 8, 15 Se ts the 4-bit type of s e rvice (TOS) value in the IP packet heade r. S ome

applications may us e TOS to provide pre cedence le ve ls and dete rmine optimum

routing me thods for packets . De fault is 0.

G. Virtual Ne t Numbe r 1-65,534 The BACnet Network Number that is as s igne d to the “virtual ne twork” cre ate d by

the IP WAN. All BBMDs participating on the IP WAN (in othe r words , all BBMDs in

the broadcas t dis tribution table ) must have this Virtual Ne t se t to the s ame number.

This Ne twork Numbe r must also be unique with res pe ct to inte rne tworke d BACne t

LANs . It cannot match othe r BACne t Ne twork Numbe rs (Ethe rne t LANs, MS /TP

LANs , ARCNET LANs, e tc.) De fault is 1.

H. IP Addre s s nnn.nnn.nnn.nnn The IP addre s s as s igne d to this de vice in dotte d-de cimal format. nnn is a numbe r

from 0-255. Follow IP addressing conve ntions and rule s for your ne twork. De fault

is 000.000.000.000, which pre ve nts IP operation when IP Enable d = Y.

Value TOS bits Description

0 0000 Default

1 0001 Minimize monetary cost

2 0010 Maximize reliability

4 0100 Maximize throughput

8 1000 Minimize delay

15 1111 Maximize security

Honeywell ALERTON ACM-AXM User Manual

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