Bacharach MultiZone, Installation & Operation Manual, Page: 63 / 84

Multi-Zone Gas Monitors
P/N: 3015-5074 Rev 11 57
Parameter Description
Stop Bits Default is 1. Can be set for 2 via System data register.
Ma ximum Response Time
4000 ms when directly accessing the MZ monitor.
8,000 ms when accessing the MZ monitor through the RD.
Error Checking CRC per MODBUS specifications
NOTE: All data sent out from the MZ is in “little endian” byte order (Least significant byte
followed by most significant byte). This should be taken into account if the master that
process the data is a “big endian” type. Non-data information (starting address, number of
points, etc.) follows normal MODBUS protocol, which is Big Endian.
B.3.6. Summary of Registers
Register
Name Number
HEX Decimal Description
System Data 0x0010 16 R/W System Setup Data
Status 0x0011 17 R/W Operating summary of faults, alarms and status
Zone Data 0x12xx 4609-4630 R/W Setup data for up to 16 zones (xx defines zone number)
CAL Data 0x0014 20 R/W Cal Factors for all gases
Date/Time 0x0015 21 R/W Set MZ date & time
Sensor Data 0x0016 22 R Raw measurement of sensors
Rel. Hold 0x0017 23 W Release MZ out of hold mode
Hold Zone 0x0018 24 W Put MZ into hold mode
Fault Log 0x19xx 6400-6401 R 20 most recent fault events (xx = 00 or 01)
Flow Log 0x001F 31 R 20 most recent flow fault events
Alarm Log 0x1Axx 6656-6658 R 20 most recent alarm events (xx = 00, 01, or 02)
Serv. Mode 0x001B 27 W Puts MZ into service mode
Rel Serv. 0x001C 28 W Release MZ from service mode
PPM 0x001E 30 R PPM values for all zones
Zone Log 0x3yxx 0-6
Trend data for each MZ zone [y = zone # (starting at 0), xx = 00 – 06]
Data
Data Type Abbreviations
C Character
Float Floating Point
I Integer
TIM Time
UI Unsigned Integer