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5.2.2
Transmission format used for the serial interface.
In the ex works configuration the following format is used: After a successful reading, the ID code is
transmitted as ASCII string, complemented by the control character<NL><CR><LF>
3
. Type designa-
tions (trovan, Destron, ISO-FDX, ISO-HDX, ...) as well as the message "wrong data format" ( see para
5.8.1 ) will be suppressed. "No Reads" will not be transmitted to the interface.
The "Data>Serial" mode may be adjusted to specific customer requirements by using the database
mode (see chapter 5.2.5). However such a new configuration can be installed only by a PC via the
"Reader Terminal" program.
5.2.3
Terminating the "Data>Serial" mode
The "Data>Serial" can be closed by pressing the buttons in the following sequence:
Attribute
Stand-By
Operating Mode
MENU
MENU
Online
Standard
5.2.4
Online H, Read/Transf.
Alike operating mode “Online” in “Online H” and “Read/Transf.” the transponder code is sent via the
data interface.
If a transponder is read successfully in “Online H” (H like handshake) a “empty” telegram is sent
first: <STX> <ETX>. To secure reception of the data the reader expects the answer <STX> <ACK>
<ETX>. Until the recipient is sending this acknowledgement the reader shows the text “
wait for
host
”. As soon as the empty telegram is acknowledged, the transponder data is sent. They are
framed with <STX> and <ETX> not ended with <CR> <NL>. As answer to this data telegram a fur-
ther <STX> <ACK> <ETX> is expected. If no communication partner is active that is supporting this
protocol the reader is trying to establish a connection until this is aborted by pressing both arrow but-
tons. The “Reader Terminal” program is supporting this protocol in its online view.
With “Read/Transf.” (read and transfer separately) at first the reader shows the text “Func-
tion=Read”. Reading the transponder is the first action when the main button is pressed. If reading
was successful the text changes to “Function=TxCode”. If now the main button is pressed a second
time the transponder data is sent. Format is the same as in online mode.
3
A complete list of all control characters is given in the appendix.
