EUCHNER CIS3A-Mini - Manual (Page 11)

EUCHNER Identsystem CIS3A-Mini
084727-01-02/03 Subject to technical modification Page 11 / 22
4 Commands for reading and writing the read/write data carrier
Read and write operations are always initiated by the host control (PC, PLC) with a "command
telegram".
The Electronic-Key-System then sends a response telegram to the control.
Control Ident system CIS3...
Command telegram
¾¾¾¾¾¾¾¾®
Response telegram
¬¾¾¾¾¾¾¾
IMPORTANT !!!
Please note:
The memory of the read/write data carriers is organised in 4 byte blocks. So it
is only possible to write complete 4-byte blocks (if you want to write only 3
bytes, you have to fill the 4
th
byte with a filler byte). You also have to pay
attention to the start address: For the start address to write any data it is also
only possible to use byte 0, byte 4, byte 8, byte 12 and so on.
This restriction is only valid for writing data into the data carrier! For reading it
is possible to read every single byte on every address.