E 10210 12 - 2005
Protocols:
MODULAR X6 CCTALK VALIDATOR 20
5.1
SIMPLE POLL [254]
Command for checking communication is working correctly and for confirming the presence in
the bus of a Validator.
Send:
[Dir] [0] [1] [254] [Chk]
Reply:
[1] [0] [Dir] [0] [Chk]
→
ACK without data
In the case that no answer is received to the request sent (reception timeout in the
Machine) it will be a sign that the corresponding validator is faulty or not connected.
The Validator always responds to this command: command not protected by a PIN.
5.2
ADDRESS POLL [253]
This command is used to request all the slave devices to return their addresses. To do this, it
is sent with destination address 0 (Broadcast). To avoid collisions, only the byte of address is
returned with a delay proportional to the value of the address.
Send:
[0] [0] [1] [253] [2]
Reply:
{Delay variable} [Dir]
Where:
Dir = address of the corresponding validator
The algorithm to calculate the delay with which it responds is the following:
Deactivate port rx
Delay (4*Dir) ms
Send [Dir]
Delay 1200 – (4*Dir) ms
Activate port Rx
