Microscan MS-96 Manuel d'utilisateur Page 47

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Chapter 3 Communications
MS-9 Scanner User’s Manual 3-17
LRC Status
(Longitudinal Redundancy Check)
Usage: Used when extra data integrity is required.
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
cumulatively 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 trans
-
mission and the receiver (usually the host) performs the same addition
and compares the results.
Serial Cmd: <K145,status>
Default: Disabled
Options: 0 = Disabled 1 = Enabled
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