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Installation and Operations Guide

ACM-VLX/VLX/EXP/AXM

Setting MS/TP options MS/TP network settings are items E, F, and G on the

Change Configuration menu.

See the BACtalk System Design Guide (LTBT-TM-SYSDSGN) for more

information about MS/TP configurations.

Use MS/TP to connect up to 10 BACnet MS/TP devices to the VLX. See Figure

6 on page 11 for more information. Do not connect the VLX to the BACnet

internetwork using MS/TP unless data traffic requirements are relatively low and

Ethernet connection is cost-prohibitive or otherwise difficult to provide. Ethernet

is the preferred primary connection method.

When connecting a VLX using MS/TP (primary connection), the total number of

devices on that MS/TP should be limited to 10 or fewer. Other factors also affect

network performance such as global-controller-hosted VLC point alarms, global

controller DDC references to devices on the MS/TP, and active operator

workstations requesting data from devices on the MS/TP.

Table 7 Ethe rnet ne twork se ttings

Item Value Re marks

B. Ethe rne t Enable d Y | N Se t to Y if Ethe rne t communications is de s ire d.

C. BACne t Ove r Ethe rne t

Enabled

Y | N Determine s whe the r BACne t packe ts are

transmitte d on the Ethe rne t ne twork. Typically

se t to Y. S e t to N only if IP is enable d (s e e

Table 10 on page 49) and the ne twork allows

only IP packe ts. N is an advance d s e tting that

require s IP network knowledge and may caus e

communication failure s if us e d incorre ctly. S e e

the BACtalk System Design Guide (LTBT-TM-

SYS DS GN).

D. Ne twork Numbe r 1–65,534 S e ts the BACne t ne twork numbe r for the

Ethe rne t LAN. Each interconnecte d BACne t

ne twork must have a ne twork numbe r unique

throughout the inte rne twork. S e lecting a

numbe r in the range 1–65,534 (and not 0) is

highly re comme nde d for flexibility and future

compliance .

Honeywell ALERTON ACM-AXM User Manual

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