Section 8 – Serial Data Interface
Page 29
Query
The TruPulse accepts Criterion 400 format requests for the firmware version ID. The instrument will
not respond to an invalid query. The format is as follows:
$PLTIT,RQ,ID<CR><LF>
$PLTIT The Criterion 400 message identifier.
RQ Indicates a request message.
ID Indicates the request type.
<CR> Carriage return.
<LF> Optional linefeed.
The instrument's response is as follows:
$PLTIT,ID, model,versionid *csum<CR><LF>
$PLTIT The Criterion 400 message identifier
ID Identifies the message type.
model Indicates the model.
versionid The main firmware revision number.
*csum An asterisk followed by a hexadecimal checksum.
The checksum is calculated by XORing all the
characters between the dollar sign and the asterisk.
<CR> Carriage return.
<LF> Linefeed.
Example Version ID Message
Request: $PLTIT,RQ,ID
Response: $PLTIT,ID,TP200,1.02,*73
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