254764-001 Rev B 49
Mode 03 (~LV03)
This mode is identical to Mode 01 with the exception of the meaning of the ~LN command:
~LN##
This command sets the
exact
number of codes to be read during a sync period. ## = the number of codes.
For example: ~LN02 causes a No Read condition to be set if less or more than 2 bar codes are fully
decoded during a sync interval. (This system is using edge sync mode, therefore a sync interval is the time
between sync inputs.) ~LN00 disables a no read condition.
Mode 12 (~LV12)
A.
Mode 12 I/O operation
1.
System will operate Envelope or Edge sync mode (~LX#)
2.
Sync polarity – programmable (~LP#)
3.
Use
~PR0210
for proper port initialization.
4.
Port 1 will go active OFF (no current) on an error condition.
5.
Port 2 will go active ON (sink current) on an error condition.
6.
Port 3 will operate in per analysis pulse mode. Active polarity ON (sink current),
approximately 500 millisecond duration. Port 3 will activate (pulse) on an error condition.
7.
Port 4 will operate in per analysis pulse mode. Active polarity ON (sink current),
approximately 50 millisecond duration. Port 4 will activate (pulse) on an error condition.
8.
Pushing the reset button or power re-cycle will place Ports 1- 4 in their inactive states.
9.
Error conditions available are:
a.
Partial Read
(~Lp#, ~LQ#)
b.
% decode programmable,
( ~LD##)
c.
Bad Quiet Zone
(~PB816xxx100)
d.
ANSI Defects grade programmable
(~PB806xxx000)
e.
ANSI Decodability grade programmable
(~PB802xxx100)
f.
Symbol Contrast grade programmable
(~PB804xxx100)
g.
No Read (if edge sync is received)
h.
Number of codes per sync programmable
(~LN##, ~LZ##)
i.
Overall ANSI Grade (Programmable,
~LAxx)
j.
Symbology modulo check digit
B.
Mode 12 LED Operation
1.
LED1 will turn on if Ports 1-4 go active due to ANSI, contrast, or quiet zone failure
2.
LED2 will turn on if Ports 1-4 go active due to a partial or no read condition
Note; Both LEDs can be on in cases where multiple bar codes are analyzed in a sync period.
C.
SV Commands Important to Mode 12
This system is operating in a “mode” rather than fully programmable logic. The port activation parameters
are programmable via the ~PB8 rather than ~PB1, ~PB2, etc. for each individual port. Other commands,
such as mode commands are also available. The commands most useful for this system application are
described below.
~LV12
This command sets this mode of operation.
~Lp0
This command turns off all partial decode logic at the decoder level
~Lp1
This command turns on partial decode logic at the decoder level
