254764-001 Rev B 42
~SC
Execute the calibration procedure.
The SV unit will respond to this command as follows:
CP505050 will be transmitted if the calibration is successful.
CF000000 will be transmitted if the calibration was unsuccessful
~Sc (lower case c)
Set Scanner Gain and Offset for symbol that is in the laser beam
This command automatically sets the scanner gain and offset to a bar code that is in the laser beam. Place
the SV unit in moving codes mode to use this command. In some cases where more than two reflectance
levels are in the beam (caused by color graphics, etc.), this command will be unsuccessful. In those
instances, use the ~Hd commands to set scanner gain and offset.
~SD
Disable Verification
This command turns the laser beam off.
~SE
Enable Verification
This command turns the laser beam on.
~SK#
Communication Sync
A sync command sent via serial communications can be used similar to an external sync input to analyze a
no read condition. In previous versions of SV firmware the only way to create a no read transmission or no
read control output from an SV unit is by detecting an external sync through inputs on pin 1,2 (Isolated) or
on pin 4 (ttl) of the Power I/O connector.
# = 0 or 1. Details of how the values are used in conjunction with other commands as follows;;
1.
Command ~LT# includes an ~LT2 choice to allow ~SK# as the sync input
2.
~SK# will be received but not cause any action if either ~LT0 or ~LT1 is set.
3.
An external sync input will not be recognized if ~LT2 is set
4.
Receipt of ~SK# command will be identical to detecting a hardware sync input
5.
After receiving the ~SK# command, the SV unit will operate per settings of the various commands
related to sync inputs - ~LR#, ~LV#
6.
~LP0 must be set when using any Output Interface Mode except 2 and 19
7.
~LP1 must be set if using Output Interface Mode 2 or 19
8.
~LX0, ~LX1, ~LX2 or ~LX3 can be used with any Output Interface Mode except 2 and 19
9.
~LX0 must be set if using Output Interface Modes 2 or 19
Operation Description
1.
If ~LX0 or ~LX2 (any envelope sync mode) is enabled
a.
Receipt of ~SK1 will be the leading edge of the envelope sync
b.
The end of the envelope sync will occur when~SK0 is received
c.
After ~SK1 is received, any additional ~SK1 received will be ignored until a ~SK0 is
received
d.
After ~SK0 is received, any additional ~SK0 will be ignored until an ~SK1 is received
2.
If ~LX1 or ~LX3 (any edge sync mode) is enabled
a.
Receipt of any ~SK0 will be ignored
b.
Receipt of any ~SK1 will be the edge sync input
Comments
1.
Recognition and response of the communication sync commands may be slower than a hardware
sync (13 ms)
