Festo Контроллеры двигателя SFC-LAC - Manual (Page 40)

1. System overview
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Festo GDCP−SFC−LACI−CO−EN en 0812NH
1.2 Communication
1.2.1 Data exchange via CANopen
CANopen devices have an object directory which makes all
important slave parameters accessible in a standardized
manner. A CANopen system is essentially configured by
accessing the objects in the object directory of the individual
stations. The data exchange in CANopen is in the form of teleĆ
grams with which the work data is transmitted. A distinction
is made between Service Data Objects (SDO), which are used
for transmitting service data from and to the object directory,
and between Process Data Objects (PDO), which serve for
the fast transfer of current process states. In addition, teleĆ
grams are defined for the network management and the fault
messages.