Philips V200 - Manual (Page 204)

Chapter 13
13-40 Respironics V200 Ventilator Operator’s Manual REF 1057983 A
Options and Accessories
Commands
Transmitted to the
Ventilator
Commands are transmitted as a series of four ASCII characters followed by a
carriage return. Valid commands will be stored and response transmissions will
be sent in the order the corresponding commands were received.
Transmission of Data
from the Ventilator
Unless stated otherwise, all fields will be left justified and six (6) characters in
length. A comma will separate each field, except for the field following the
start code. Each data transmission shall be terminated with a carriage return.
In the following subparagraphs, a space is designated as “ ◆”. When data is
unavailable, the output field shall contain “ ◆◆◆◆◆◆”
SNDA, Send
Variable Length
Ventilator Settings
Report
When the ventilator receives SNDA followed by a carriage return, it will
respond by transmitting the information shown in Table 13-4: “Ventilation
Report”. The ventilator responds to the SNDA command by returning a string
with a variable length. The second and third fields define the length of the
message. The second field indicates the number of characters between the
start and stop codes. The third field indicates the number of fields between
the start and stop codes. The fourth field is the start code, 02H. The last field
in the string is the stop code, 03H, indicating the end of the message.
NOTE: The SNDA command is only available in Normal mode.
Ventilation Report
Description Example Resolution Range Units Comments
Command Name MISCA N/A N/A N/A 5 character field
Number of characters
between the start and
stop codes 706 N/A N/A N/A 3 character field
Number of fields
between the start and
stop codes 97 N/A N/A N/A 2 character field
Start Code 0x02 N/A N/A N/A ASCII Start
Transmission
Character (STX)
Time of request 13:45 N/A N/A N/A 24 hour clock,
hh:mm
Not used N/A N/A N/A 18 character field.
Outputs example
value.
Table 13-4: Ventilation Report (Sheet 1 of 10)