29 Rev. 2.4 (3/05)
Honeywell Analytics CM4 Protocol Manual
Get One Alarm This packet returns the oldest unread entry from
0x47 the alarm history. It duplicates the functionality of
packet 0x36 in a form that some masters may
nd more convenient. Note that this packet causes
an alarm to be marked as read in the same way as
packet 36. If no unread entries exist in the history,
the response packet will contain zeros in the alarm
date eld.
Command packet to slave:
Command Code (0x47) - 1 byte
Response packet from slave
Command Code (0x47) - 1 byte
CM4 Date - 2 bytes
CM4 Time - 2 bytes
Alarm Date - 2 bytes
Alarm Time - 2 bytes
Gas abbreviation - 6 bytes (not null
terminated)
Point number - 1 byte
bits 0-1 point number
bits 2-7 undened
Concentration - 4 bytes (in IEEE oating
point format)
Alarm Level - 1 byte
bit 0: alarm level
0= level 1
1= level 2
bits 1-7: undened
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