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EXTERNAL CONNECTIONS
15.6.2
Communication protocol
The monitor is always assumed to be "slave" in the sense that it cannot transmit information
unless it has been requested to do so. The messages are always transmitted in "ASCII".
To initiate a communication the requesting device pulls RTS true and waits until the monitor
replies with CTS true. Transmission can then proceed.
There are three different request codes possible which TOSCA 500 can understand. The
format of these codes and the corresponding replies are described below.
Request code no. 1 status: "Monitor status record"
Request format:
CRLF01$
Reply format:
CRLFrrn1n2
A C
F U
CRLF[00_> N O _ND]
S _
CRLF$
Example:
0000
[00 >N ND]
$
Request code no. 2 values: "Value and status record"
Request format:
CRLF02$
Reply format:
CRLFrrn1n2
CRLF00[PCO2(tc43.0)_>2 N _PCO2=078mmHg _> N ]
CRLF00[SPO2_>3 N _SPO2=078PERCNT_> N ]
A
F
CRLF00[PR_>4 N _PR=088BPM_> N ]
S
CRLF00[HPWR_>5 N _HPWR=0589mW_> N ]
CRLF$
108
A
F
S
A
F
S
A
S
A
F
S
EE.EkPa
EEEmmHg
10.4kPa
A
S
A
S
S
TOSCA
500
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