Appendix A
Appendix A-22 Respironics V200 Ventilator Operator’s Manual REF 1057983 A
RS-232 Communications Protocol
Alarm Status Report

Description Example Range Comments

Command Name ALRM N/A
Number of characters between the start
and stop codes 202 N/A 3 character field
Number of fields between the start and
stop codes 28 N/A 2 character field
Start Code 0x02 N/A ASCII Start
Transmission
Character (STX)
Time of request 13:45N/A 24 hour clock,
hh:mm
Date FEB231997N/A 12 character field,
MMMDDYYYY
Occlusion Alarm Status or SM Occlusion
Status NORMAL NORMAL
ALARM
RESET
Safety Valve Status NORMAL NORMAL
ALARM
RESET
Low Internal Battery Alarm Status NORMAL NORMAL
ALARM
RESET
Nonvolatile Memory Failure—Using
Default Settings NORMAL NORMAL
ALARM
RESET
Primary Alarm Failure NORMAL NORMAL
ALARM
RESET
High Inspiratory Pressure Alarm Status NORMAL NORMAL
ALARM
RESET
Apnea Alarm Status NORMAL NORMAL
ALARM
RESET
Low Inspiratory Pressure Alarm Status or
Disconnect Alarm Status NORMAL NORMAL
ALARM
RESET
Air Source Fault Alarm Status NORMAL NORMAL
ALARM
RESET
O2 Valve Stuck Closed Alarm Status NORMAL NORMAL
ALARM
RESET

Table A-6: Alarm Status Report (Sheet 1 of 3)