E 10210 12 - 2005
Protocols:
MODULAR X6 CCTALK VALIDATOR 10
3.
LOGIC LEVEL
3.1
Message structure
The format of the messages is the following:
[Destination address]
[Nº of data bytes]
[Origin address]
[Header]
[Data 1]
[Data 2]
...
[Data N]
[Checksum]
Each sequence of communication is made up of two strings. The first corresponds to the
command sent by the Machine to the Validator, and the second is the reply sent by the
Validator to the Machine. Both strings have the format indicated previously.
3.2
Destination address
The ‘Destination address’ byte indicates the node on the bus (slave) Where the message is
directed. The range of addresses goes from 0 to 255 (of those 254 correspond to Validator
addresses as is explained further on).
0: Used in messages that affect all the Validators simultaneously, (Broadcast
messages).
1: Machine address. When the message is directed from the Validator to the Machine.
2 to 255: addresses of the Validators in multi-slave communication, configurable using
software with MDCES commands. The default address of the Validator is 2
although it can be modified using commands.
