Honeywell CM4 - Get TWA Time - 0 X38; Get Display Cycle Time - 0 X39

20 Rev. 2.4 (3/05)
Honeywell Analytics CM4 Protocol Manual
Get TWA Time This command queries the three TWA output
0x38 time in a 24-hour format. Each of the TWA times
are eight hours apart.
Command packet to instrument:
Command Code (0x38) - 1 byte
Response packet from instrument:
Command Code (0x38) - 1 byte
CM4 Date - 2 bytes
CM4 Time - 2 bytes
TWA time 1 - 2 bytes
TWA time 2 - 2 bytes
TWA time 3 - 2 bytes
Status - 1 byte
0x00 = Time read
0xff = Error in reading
Get Display This command queries for the length (in seconds)
Cycle Time that the concentration for each point is displayed
0x39 while the unit is in the Monitoring mode.
Command packet to instrument:
Command Code (0x39) - 1 byte
Response packet from instrument:
Command Code (0x39) - 1 byte
CM4 Date - 2 bytes
CM4 Time - 2 bytes
Cycle Time - 1 byte
(valid 2-10 sec., default 4 sec.)
Status - 1 byte
0x00 = No error
0xff = Error