Omron V430-F-series User Manual page 395

Serial Commands
Serial Command Status Request
To ensure that any command was received and accepted, send the Show Reader Status
command: <?>.
The status of a specific serial command can be requested by entering the command followed
by a question mark. For example, send <K142?> to request the status of Postamble.
Entering Control Characters in Serial Commands
To enter control characters within a serial command, hold down the Ctrl key while typing
the desired character.
Example: To enter a carriage return and line feed (^M^J), enter <K141,1,CNTL-m CNTL-j>
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Auto Focus Multi Code Reader V430-series User's Manual (Z392)