Appendix B
B-4 Respironics V60 Ventilator User Manual 1047358 Rev N
Communications interface
Communications protocol
The RS-232 serial protocol is configured as follows for all communications
functions:
• Baud rate: Configurable in diagnostic mode
• Data bits: 8
•Parity: None
• Stop bits: 1
•Flow control: None
Commands and transmission conventions
The ventilator supports the following commands that are of interest to the user:
• VRPT (Send Ventilator Report) (Table B-1)
• SNDA (Send Variable-Length Ventilator Report) (Table B-2 on page B-10)
These commands, which are available during ventilation, return raw data that
can be used for monitoring the patient and ventilator.
After receiving a command, followed by a carriage return, the ventilator
responds by transmitting the information in the tables. The fields that
comprise these tables are separated by commas. The ventilator stores and
responds to valid commands in the order received. It returns invalid commands
in an error message.
The ventilator also supports service-oriented commands. Contact Philips for
details.
In the tables shown, a space is designated as "◆
". When a field is unused, the
output field contains all spaces.
Table B-1: VRPT record format
Field Description Example Resolution Range Units Comments
H1 Command name VRPT N/A N/A N/A
H2 Number of characters
between the start and
stop codes
990 N/A N/A N/A 3-character field
H3 Number of fields
between the start and
stop codes
134 N/A N/A N/A 3-character field
H4 Start code 0x02 N/A N/A N/A ASCII Start
Transmission
character (STX)
1 Time of request 13:45◆ N/A N/A N/A 24-hour clock,
hh:mm◆
2Date FEB◆23◆2008◆ N/A N/A N/A 12-character field,
MMM◆DD◆YYYY◆
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