Set Twa Time - 0X5A - Honeywell CM4 Technical Handbook

CM4 Four-Point Continuous Monitor

Set TWA Time - 0x5A

This command configures the TWA time output. You need to enter only
the initial TWA output time. The other two time factors are calculated
automatically.
Command packet to instrument:
Command Code (0x5A) - 1 byte
TWA Time - 2 bytes
Command Code (0x5A) - 1 byte
CM4 Date -2 bytes
CM4 Time - 2 bytes
Status - 1 byte
0x00 = Value saved and verified
0x02 = Minutes Invalid
0xff = Not saved
Set Display Time - 0x5B
This command configures the length in seconds Cycle that the
concentration for each point is displayed while in the Monitor mode.
Command packet to instrument:
Command Code (0x5B) - 1 byte
Cycle time - 1 byte (valid 2-10 sec)
Response packet from instrument:
Command Code (0x5B) - 1 byte
CM4 Date - 2 bytes
CM4 Time - 2 bytes
Status - 1 byte
0x00 = Value saved and verified
0x01 = Value < 2 seconds
0x02 = Value > 10 seconds
0xff = Not saved
CM4 Technical Manual
Set Idle Time - 0x5C
This command configures how long the unit can be left out of
analysis before setting an Instrument fault. Idle time allows you to
exit the Monitoring mode without causing an Instrument fault (if the
idle time is > 0). You simply set the idle time to an appropriate idle
(non-monitoring) time. If the idle time has expired and the unit is not
in the Monitoring mode, an instrument fault will be issued. An idle
time setting of 0 disables this option.
Command packet to instrument:
Command Code (0x5C) - 1 byte
Idle Time - 1 byte (0 disabled, 1-45 mins)
Response packet from instrument:
Command Code (0x5C) - 1 byte
CM4 Date - 2 bytes
CM4 Time - 2 bytes
Status - 1 byte
0x00 = Value saved and verified
0x01 = Value > 45
0xff = Not saved
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