Microscan MS-890, User Manual, Page: 71 / 308

MS-890 Industrial Automation Scanner User Manual
4-1
4 Read Cycle
Contents
After you’ve established communications and completed basic read rate testing, you will
need to address the spatial and timing parameters associated with your application. In a
typical operation, a bar-coded item moves along a line past a scanner. A trigger or timer
activates a read cycle during which the scanner actively searches for symbols. You will
need to decide how to initiate the read cycle and how and when to end it.
Note: When assigning characters in user-defined fields, the characters NUL , < , > , and ,
can only be entered through embedded menus, not through ESP or serial commands.
Note : You can learn the current setting of any parameter by inserting a question mark after
the number, as in <K100?> . To see all K commands, send <K?> .
Note on Serial Commands: To preserve continuity with other Microscan products, some
serial configuration commands may include 0 s or 1 s as placeholders. In order for a these
commands to be implemented, the parameter values or a comma must be included.
Read Cycle by ESP...................................................................................................................... 4-2
Read Cycle Serial Commands ..................................................................................................... 4-2
Multisymbol................................................................................................................................... 4-3
Trigger .......................................................................................................................................... 4-5
External Trigger State................................................................................................................. 4-11
Serial Trigger.............................................................................................................................. 4-12
Start Character (Non-Delimited)................................................................................................. 4-13
Stop Character (Non-Delimited) ................................................................................................. 4-13
End of Read Cycle...................................................................................................................... 4-14
Good Decode Reads.................................................................................................................. 4-17
Gain Settings.............................................................................................................................. 4-18
Focus.......................................................................................................................................... 4-19
Scan Speed................................................................................................................................ 4-20
Automatic Gain Control (AGC) Settings ..................................................................................... 4-21
Maximum Element...................................................................................................................... 4-22
Tracking Adjustment................................................................................................................... 4-23