45 Rev. 2.4 (3/05)
Honeywell Analytics CM4 Protocol Manual
Set Filter This command allows a master to set the lifetime
0x66 of a lter. See packet 44 for a discussion of these
parameters. The valid range of lifetimes is 30 to
365 days. The system maintains the number of
days remaining as a constant if the lifetime
changes.
Command packet to instrument:
Command code (0x66) - 1 byte
Internal lter lifetime (days) - 2 bytes
External lter lifetimes (days) - 2 bytes
Response from instrument:
Command code (0x66) - 1 byte
CM4 date - 2 bytes
CM4 time - 2 bytes
Status - 1 byte
0x00 = packet accepted
0x01 = internal lter lifetime
unacceptable
0x02 = external lter lifetime
unacceptable
0xFF = slave in monitor, unable to
accept changes
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