User's Manual

Rev 09
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3.1.2.3 Output at parameter query
Parameter settings can be queried by sending the command without adding a parameter value. Exam-
ple:
Command: MD <CR>
Output: 2 <CR>
3.1.3 Blank instuction
If a single <CR> is input, the reader answers with a single <CR>. Example:
Command: <CR>
Output: <CR>
3.1.4 Incorrect instruction / error codes
If a command is not entered correctly, the reader sends one of the following error codes:
ERROR CODE MEANING
NAK #00 <CR> unknown command
NAK #02 <CR> wrong parameter
NAK #10 <CR> antenna failure
XXXXXXXX <CR> no read
ACK no error/acknowledge