Metrologic Instruments MS951 - Manual (Page 19)

* *
R 5 8
R 5 9
R A O
R 9 9
T R 2
T R 1
T R 4
T R 3
Enter/Exit Program Mode
14
Longitudinal Redundancy Check (LRC)
A Longitudinal Redundancy Check (LRC)is an Enable LRC Calc+
error checking character that is calculated across Transmit RS232
a sequence of data characters. It is determined by
eXclusive ORing (XOR) the characters to be
checked, starting with an initial value of 00H.
**Disable LRC Calc+
The result, an "LRC byte" is then transmitted Transmit RS232
following the data stream and used by the receiving
computer to determine if the information was received
correctly. In the scanner's case, XOR is performed
prior to adding parity bits. Start LRC on
First RS232 Byte
When the LRC is enabled, the scanner defaults to
starting the LRC on the second byte of information
transmitted. Optionally, the calculation can start on
**Start LRC on
the first byte transmitted. Second RS232 Byte
Record Header/Terminator Select
** CR On When this option is on, the scanner will transmit a
Carriage Return after each bar code.
CR Off
** LF On When this option is on, the scanner will transmit a Line
Feed after each bar code.
LF Off