Example of a CAN Telegram
A CAN telegram is to be sent to start Valve 2 with line 3 in the corresponding control program in a PICO controller
with address 10. These are the ways in which the parameters can be shown in various numbering systems:
Parameter Value
Start valve 5 decimal
= 5 hexadecimal = 0101 binary
Address of CONTR. 2+2 10 decimal
= 0A hexadecimal
= 001010 binary
Valve no. 2 decimal
= 2 hexadecimal = 00000010 binary
Line no.
3 decimal
= 3 hexadecimal = 00000011 binary
The programmer sends this data to the master in the required number format. Based on this data, and working
with the master software, the identifier and the data field are created for a master request (telegram from master to
slave).
For this example, the identifier and data field of the master request have the following structure:
After receipt of the telegram, the slave sends a response. The response also contains the identifier, whereby the
value 1 is now assigned to bit 10. The status of the slave is indicated with error bytes in the data field.
If the selected address can execute the command (meaning no error), the identifier and data field of the slave
response have this structure:
NOTES:
• The transition to the CAN bus communication, the address assigned to the unit, and the required transmission
rate must be set through the PICO controller menu.
• When bus communication is activated, Manual Mode and Automatic are inactive.
• The PICO controller EMERGENCY OFF switch can be used with the Stop = 1 or Stop = 2 options, which are
set in the control program (refer to “Control Programs” on page 33). When Stop = 0 in the valve program, the
EMERGENCY OFF feature is inactivated (e.g., for test purposes).
Data Communication via CAN Bus (continued)
PICO Controller 2+2-XCH-V2
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