Lrc - Microscan MS-3 Manual Book

Chapter 3

LRC

(Longitudinal Redundancy Check)
Definition: An error-checking routine that verifies the accuracy of transmissions. It
is the exclusive OR of all characters following the STX (start of text) up
to and including the ETX (end of text). What this means is that the
binary representation of all the characters in a transmissions are cumu-
latively added in a column and each resulting odd integer is assigned a
1 and each even integer a 0 (two 1s = 0, two 0s = 0, a 1 and a 0 = 1).
The extra LRC character is then appended to the transmission and the
receiver (usually the host) performs the same addition and compares
the results.
Usage: Used when extra data integrity is required.
Serial Cmd: <K145,status>
Default: Disabled
Options: 0 = Disabled
MS-3 Laser Scanner User's Manual
1 = Enabled
Protocol
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