Owner's Manual

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.
Maximum 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 Releas e 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