Specifications

Halogen Gas Monitor – Multi Zone
Instruction 3015-5074 3
4–20 mAdc Interface Board ................................................................................................................... 44
Replacement Parts & Optional Accessories.............................................................................................. 45
Replacement Parts................................................................................................................................. 45
Item Description ..................................................................................................................................... 45
Part Number........................................................................................................................................... 45
Item Description ..................................................................................................................................... 45
Part Number........................................................................................................................................... 45
Surge Protectors: ................................................................................................................................... 45
Specifications............................................................................................................................................. 46
APPENDIX A................................................................................................................................................. 47
Recommended Alarm Settings & Gas Enumeration.............................................................................. 47
APPENDIX B................................................................................................................................................. 48
RS-485 Communication Protocol .............................................................................................................. 48
Overview ................................................................................................................................................ 48
MODBUS RTU Protocol......................................................................................................................... 48
HGM-MZ MODBUS RTU Operation.......................................................................................................... 49
Overview ................................................................................................................................................ 49
Protocol Details ...................................................................................................................................... 49
HGM-MZ Polling..................................................................................................................................... 49
Network Topologies................................................................................................................................ 49
Key Comm Protocol Parameters............................................................................................................ 50
Summary of Registers............................................................................................................................ 52
System Data Register ............................................................................................................................ 52
Status Register ............................................................................................................................... 53
Fault Code Table.................................................................................................................................... 53
Zone Data .......................................................................................................................................... 54
Alarms & Alarm Acknowledge................................................................................................................ 55
Date Time Register ............................................................................................................................... 56
Sensor Data Register ............................................................................................................................ 56
Release Zone Hold Register.................................................................................................................. 57
Hold Zone Register ...............................................................................................................................57
HGM-MZ Hold Mode .............................................................................................................................. 57
Releasing the Zone hold: ....................................................................................................................... 57
Fault Log Register ................................................................................................................................58
Flow Log Register ................................................................................................................................58
Alarm Log Register .............................................................................................................................. 58
Service Mode Register .......................................................................................................................... 58
Release Service Mode Register ....................................................................................... 59
HGM-MZ Service Mode.......................................................................................................................... 59
Releasing the unit from Service Mode: .................................................................................................. 59
PPM Register ....................................................................................................................................... 59
Zone Log Registers ............................................................................................................................... 59
MODBUS Exception Responses............................................................................................................ 60
APPENDIX C................................................................................................................................................. 61