HERMOS LFM LP Reader - Lock Data Area

Protocol description ASCII, SECS/HSMS
Customer manual
Version 1.2
LFM LP Reader 15.01.2019
Page 52 of 119
HERMOS AG
Gartenstrasse 19 Tel. +49(9279) 991-0
D-95490 Mistelgau Fax. +49(9279) 991-100
10.4.11 L – Lock data area
A single page of a multipage transponder can be disabled. The page can still be read, but not rewritten.
The process cannot be reversed.
Host  Device
CMD
Reader-ID
Page
L
1 Byte
2 Bytes
Device  Host
CMD
Reader-ID
L
1 Byte
If the lock of the transponder page fails, the reader repeats the procedure several times before an error
message is sent. The number of repetitions is defined in parameter 4 ('r / w maxrepeat'). If writing is
still not possible, the reader sends the error message 'no tag (4)' to the host after the repetitions have
been carried out.
If the page was already locked, a positive confirmation will be sent (same as the first block).
If the sensor check is activated (parameter 1 readmode), the assignment of the external input is
checked before the blocking process is started by the host. The locking process is only started when
the sensor is occupied, otherwise the error message 'no tag (4)' is sent.
Locking a page cannot be reversed.
This page is permanently write protected.