Lrc Status; Intercharacter Delay - Microscan MS-3 User Manual

LRC Status

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 transmission and the
receiver (usually the host) performs the same addition and compares the
results.
Serial Cmd: <K145,LRC status>
Default: Disabled
Options: 0 = Disabled

Intercharacter Delay

Usage: Used only when a host cannot receive data quickly enough and there is
enough time between symbols to allow data to be completely transferred.
It is rarely used since any setting other than zero will slow down commu-
nications. For example, a 200 setting will result in a 1/5 second delay
between each character that is transmitted.
Definition: The time interval in milliseconds between individual characters transmit-
ted from the scanner to the host.
Serial Cmd: <K144,intercharacter delay>
Default: 0
Options: 0 to 255 (in milliseconds). Zero (0) causes no delay between
characters.
MS-3 Laser Scanner User's Manual
3-22
1 = Enabled