E.5 Operation - Honeywell CM4 Technical Handbook

CM4 Four-Point Continuous Monitor

E.5 Operation

E.5.1 CM4 Instrument Power-up
Upon power-up, the CM4 instrument conducts a self-diagnostic
procedure to check its memory, hardware, and voltages. After the
self-diagnostics, the instrument automatically begins monitoring, and
the COM port (if enabled) is activated.
E.5.2 Commands
Your CM4 instrument will accept and process commands sent to it
from your equipment.
E.5.3 Responses
The CM4 instrument will send a return communication for any message
it receives at its address. Included in most response packets from the
CM4 instrument are date and time stamps.
CM4 Technical Manual
E.6 Example Packets
The following section contains examples of packets from a master
to a slave and the slave's responses. Protocol version 2 is used. The
address of the slave is 1. All numbers are in hexadecimal.
Master 40 01 00 06 28 91
Slave 40 00 01 06 20 99
Master 40 01 00 06 31 88
Slave 40 00 01 20 31 24 A6 47 31 5E C1 02 00 00 00 00
00 FF FF FF FF 00 B9 00 A5 00 A4 00 CD 00 00 40
Master 40 01 00 06 35 84
Slave 40 00 01 30 35 24 A6 47 33 01 4E 48 33 2D 49 49
00 81 00 FA 01 F4 02 EE 02 EE 50 54 31 2D 43 4D
34 2D 38 35 31 2D 30 30 30 36 20 20 20 20 00 39
Master 40 01 00 06 37 82
Slave 40 00 01 21 37 24 A6 47 35 4E 48 33 2D 49 49 81
00 B9 24 A6 47 10 24 A6 47 35 00 00 00 00 00 00
F8
Master 40 01 00 06 3C 7D
Slave 40 00 01 1B 3C 24 A6 47 39 4E 48 33 2D 49 49 02
EE 00 FA 00 1E 00 1E 81 04 00 EB
Master 40 01 00 06 3D 7C
Slave 40 00 01 1D 3D 24 A6 47 3A 03 24 A6 46 E2 09 81
24 A6 46 CF 09 81 24 A5 81 17 09 81 47
E-27