Cardin Elettronica MORPH433W01 Mode D'emploi page 25

If you choose the WIEGAND protocol 1,2,3,6,7 and 9 (pages 20...22) it is possible that the Mor-
pheus transceiver code exceeds the maximum code length that can be represented by the avail-
able bits. With jumper "J1" not inserted, no WIEGAND output will occur, code information on the
RS232 line will however be available.
Inserting jumper "J1" activates the "code truncation" function which eliminates the most signifi-
cant bits which cannot be represented by the chosen WIEGAND format.
E.g. 1:
If you choose the 26 bit WIEGAND protocol with site code (limit 65'535) and the transmitter code is
356'890, the truncation function will cancel the first bit and the code effectively sent in WIEGAND
output will now be 56'980 (A number less than 65'535).
E.g. 2:
If you choose the 37 bit BCD WIEGAND protocol with site code (limit 542'287) and the transmitter
code is 18'436'500, the truncation function will return the code 436'500.
Attention! Activating the "truncation function" (jumper "J1" inserted) it is possible that two
transmitters (even though they have different codes) send an identical sequence of bits to
the interface output.
For example in the case of the WIEGAND 26 bit protocol with site code the codes 138'612
and 238'612 will activate the same bit sequence in output, 38'612.
CODE TRUNCATION
25