Specifications

Multi-Zone Gas Monitors
62 P/N: 3015-5074 Rev 10
2. Modify the content of the status register to change the MODE parameter to normal mode. Active
zone parameter to the zone which you would like to resume normal activity on
3. Send this updated status register structure back to the MZ using PRESET MULTIPLE REGISTER
COMMAND to the RELEASE HOLD REGISTER (0x0017h).
B.3.17. Fault Log Register 0x1900-01 (6400-6401 Dec) (R, 302 Bytes)
These registers contain the 20 most recent fault events, the time they occurred, and a pointer to the most
recent event. The data is split into 2 registers. The first register contains 200 bytes and the second register
contains 102 bytes. The results of these two register reads should be recombined into the Fault Log Data
Structure after both have been received.
Variable Type Length Description
Fault UI 40 bytes
20 most recent fault events. Each event is decoded as indicated in Fault
Flag Structure given after the Status Register Description
Time TIM 260 bytes
Time of each fault occurrence. TIM value as defined in NOTE 2 of Zone
Data
Ptr UC 1 byte Pointer to most recent event
Unused UC 1 byte Unused
B.3.18. Flow Log Register 0x001F (31 Dec) (R, 142 Bytes)
Variable Type Length Description
Flow Event UI 40 bytes
20 most recent flow fault events. Each bit of the unsigned int represents a
zone and a 1 indicates no flow. Zero indicates flow.
Purge Flow
Event
UC 20 bytes
20 most recent flow fault events where a 1 indicates no flow. Zero indicates
flow.
Time TIM 80 bytes
Time/date stamps for 20 most recent logged flow events. This variable is an
unsigned long integer formatted as seconds since Jan 1 of 1980
Ptr UC 1 byte Pointer to most recent event
Unused UC 1 byte Unused
B.3.19. Alarm Log Register 0x1A00-02 (6656-58 Dec) (R, 582 Bytes)
These registers contain the 20 most recent alarm events, the time they occurred, and a pointer to the most
recent event. The data is split into 3 registers and should be recombined into an appropriate structure after
all three registers have been received. Register 0x1A00h contain 200 bytes, Register 0x1A01h contains
200 bytes, and register 0x1A02h contains 181 bytes.
Variable Type Length Description
Event UC
320
bytes
20 most recent alarm events. Each event contains 1 byte for each zone. Each
zone Byte is defined as 0=No Alarm, 1=Leak Alarm, 2=Spill Alarm, 3=Evac
Alarm.
Time TIM
260
bytes
Time of each alarm event. TIM value as defined in NOTE 2 of Zone Data
Ptr UC 1 byte Pointer to most recent event
Unused UC 1 byte Unused