User's Manual

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If the echo function is activated using the EC command, every signal sent to the reader is immediately sent
back (echoed) after receipt. Thus the echo function can be used as life indication. If the reader is controlled
by a terminal, the echo function should normally be activated.
If an echo function is not intended, e.g. in automation applications where the reader might be connected to
an PLC, the echo function should be deactivated.
3.2 Entering of commands
The protocol format is as follows
command <SP> parameter <CR>
The space character <SP> separates the commands from the parameter value. The <CR> character
terminates the command line.
For commands without parameter values (e.g. GT or RST) the <SP> character and parameter values
are omitted. The command line is as short as this:
command <CR>.
3.3 Output format
Generally, every input terminated by <CR> is acknowledged by the reader. The following response proto-
cols are different:
3.3.1 Command specific response
After a correct command without parameter value is sent to the reader, the reader answers using a for-
mat, which is specific for the submitted command. Example:
Command: GT <CR>
Output: transponder number <CR> or NoRead-code
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<CR>
3.3.2 Response to a parameter change
After entering a valid command together with a parameter value, the system answers by sending the pa-
rameter value and <CR>. Example:
Command: MD <SP> 1 <CR>
Output: 1 <CR>
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see chapter3.10.1