E 10210 12 - 2005
Protocols:
MODULAR X6 CCTALK VALIDATOR 22
Although there exists the possibility that two devices share the same address generate the
same random number, the probability that this occurs is very small (1 in 254*256 = 1 in
65.024).
The Validator always answers to this command: command not protected by a PIN.
Notes:
a)
The Validator will not receive any more commands until 1.2 seconds after having
received the command.
5.4
ADDRESS CHANGE [251]
This command permits the programming of a new address to the Validator, valid for all the
commands that it receives. In case that the new address is 0 or 1, the Validator will take the
default address as its new address. The address is stored in the Flash memory of the Validator.
Send:
[Dir] [1] [1] [251] [Data 1] [Chk]
Reply: [1] [0] [Dir] [0] [Chk]
-> ACK without data
Where:
Dir = address of the corresponding validator
Data 1 = new address of the corresponding validator
Command protected by a PIN.
Notes:
a)
The reply ACK is carried out with the original address [Dir]. The following commands to
be transmitted will only be accepted if they are directed at the new address [Data 1].
b)
Once this command is used with this option (new address = 0 or 1) and when there is
the possibility that the Machine does not know the new default address of the Validator,
the Machine should send the command SIMPLE POLL [254].
c)
If the Validator cannot save the new value of the address in its memory a NACK is
returned.
