Welch Allyn LC101 CO2 Module - User Manual - Manual (Page 27)

LC101 CO
2
Module OEM Implementation Manual Section 4 - Host/Module Communications
Welch Allyn OEM Technologies Confidential Page 27
Host Commands
The host communicates to the Module via commands. These include:
• mode commands to request a change in the operating mode.
• simple commands to request data or a status change. Data is not sent with these
commands.
• configuration commands to specify custom system settings. Data is sent with these
commands.
• calibration commands to request a Zero or User Calibration sequence. Data is sent
with these commands.
Mode Commands
Mode commands allow the host to put the Module into one of the three operating modes.
No more than two mode commands should be issued in any five-second period.
The Module automatically reverts to fault mode if a Module or sensor fault occurs. A fault
message is sent via the status response by the Module to the host when polled for status.
Host Command Description
Enter auto run mode
To start automatic sampling and data packet transmission at default
intervals of realtime CO
2
waveform and breath data. A watertrap
removal causes the Module to wait for a watertrap insertion. This is
the preferred operating mode since temporary watertrap
removal and replacement is typical in normal operation.
Enter measurement mode
Same as auto run mode except for sidestream watertrap removals.
Instead of waiting for watertrap insertion, the sensor’s activity is
halted and the Module reverts to the standby mode and requires a
new host command to restart measurement.
Enter standby mode
Used when a low power standby state for the Module is desirable.
This prolongs the life expectancy of the IR source, since this com-
ponent is disabled in this mode.