Manual

FIRElink-400 Air Sampling System – Installation Manual Page 41 of 58

9-5-0-346/ISS4/OCT10

7 External Communications

7.1 BMS Protocols on the FIRElink-400 Command Module

The Command Module of the FIRElink-400 has a second RS232 port that can be used to send messages

to a pager or compatible GSM phone using a modem or to enable connection to a Building Management

System (BMS). This comprises the terminals "RS 232 Tx" (transmit), "RS 232 Rx" (receive) and "GND"

on the green terminal block inside the unit (see section 185619544.01.1.1 “Command Module Terminal

Block Connections” on page 34).

Set-up of the Command Module is done using three functions;

BMS Protocol (see section

185619544.01.1.1 on page 23,

Page on Fault (see section 185619544.01.1.1 on page 25) and

Page on Alarm (see section 185619544.01.1.1 on page 25).

When either

Page on Fault or Page on Alarm is enabled the second serial port is reserved

exclusively for paging purposes by setting

BMS Protocol to 0 (TAP paging).

Programmable function

BMS Protocol sets the communications format that is used by the second

serial port to communicate with the BMS. Setting

BMS Protocol to anything other than 0 (Tap

paging) will disable functions

Page on Fault and Page on Alarm if they are enabled.

BMS Protocol numbers are as follows:

Protocol Number Protocol

0 TAP Paging (default)

1 Output only. Events are sent in the same ASCII text

format as the internal event log display. This may be

used to drive a serial printer if required.

2 BACnet ANSI/ASHRAE standard 135-1995.

1.1.1 Text Output Support (Protocol 1)

Text is output at 9600 baud, 8 bit with no parity. When an event occurs the event is printed in the

following format:

Device 'Command Module' or 'Detector n'

Event 'Fire 1'

Timedate 10:32 21/03/2001

1.1.1 BACnet Support (Protocol 2)

The Command Module models the attached detectors as analogue value object types instances 2 to 128.

The Command Module status is stored as analogue value instance 1. The Present_Value property of the

analogue objects can have one of the following values; 0 = Disabled; 2 = Fault; 32 = Normal; 48 =

PreAlarm; 64 = Fire 1; 128 = Fire 2.