OBID
®
classic-pro
Manual
ID CPR30.xx
FEIG ELECTRONIC GmbH
Page 13 of 126
H01114-0e-ID-B.docx
2.3. Data Format and Protocol Frames for bi-directional communication
The communication between Reader and connected host (terminal, PC, etc.) is executed by means
of fixed protocols. During data transfer the Reader supplies the required data or a status byte. The
reply contains the transmitted command byte.
There is no reply from the Reader in case of a protocol frame failure.
The Reader supports two different Protocol frames which are the standard and the advanced proto-
col frame. The Host Application can chose which protocol frame shall used.
If the host application chose advanced protocol frame the Reader will always response with ad-
vanced protocol frame.
If the host application chose the standard protocol frame the Reader’s response will depend on
the length of the response data.
If the response data will result a protocol frame with more than 255 Byte the Reader chose the
advanced protocol frame otherwise the Reader chose the standard protocol frame.