Section #6 – Serial Data Interface 48
Electronic Copy of LTI's UltraLyte LR B User's Manual - 2
nd
Edition © 2002
Criterion 400 Download Format
Version ID Requests
When the Survey Mode is active, the instrument accepts Criterion 400
format requests for the firmware version ID.
The format is as follows:
$PLTIT,RQ,ID<CR>[<LF>]
$PLTIT The Criterion message identifier.
RQ Indicates a request message.
ID Indicates the request type.
<CR>[<LF>] A carriage return and optional linefeed.
The instrument’s response is as follows:
$PLTIT,ID, model, versionid *csum<CR><LF>
$PLTIT,ID Identifies the message.
model Indicates the UltraLyte model (UL100).
versioned The version ID of the internal firmware.
*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><LF> A carriage return/line feed combination, which
terminates each Criterion-format message.
Example Version ID Messages
Request:
$PLTIT,RQ,ID
Response:
$PLTIT,ID,UL100,3.01*40
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