Honeywell CM4 - Table of Contents

Contents
Introduction 1
Overview 1
Glossary 2
Communication Port 3
Set up Procedure 4
Protocol Specics 5
Data and Packets 5
Checksum (Check Character) 6
ACK/NAK Handshake 7
Protocol Packet Definition 8
Packet Format 8
Start Code 8
Receiver Address 8
Transmitter Address 8
Length 8
Command 8
Data 8
Checksum 8
Date Format 9
Time Format 9
Date/Time Examples 9
Concentration Data Format Code 9
Generic Responses 10
ACK - 0x20 10
NAK - 0x21 10
Bad CMD - 0x66 10
Unknown CMD – 0x67 10
Protocol Command Definition 11
Status and Query Commands 11
NOP - 0x28 11
Get System Information – 0x30 11
Get Unit Status – 0x31 12
Get Idle Time - 0x32 15
Get Date & Time - 0x33 15
Get Maintenance Dates - 0x34 16
Get Point Conguration - 0x35 17
Get Alarm History - 0x36 18
Get Current Point Status - 0x37 19
Get TWA Time - 0x38 20
Get Display Cycle Time - 0x39 20
Get the Number of Gas Tables Available - 0x3A 21
Get Printer Setup - 0x3B 21
Get Gas Table Data - 0x3C 22
Get Fault History - 0x3D 23
v Rev. 2.4 (3/05)
Honeywell Analytics CM4 Protocol Manual