Festo Контроллеры двигателя SFC-LAC - Manual (Page 21)

Contents and general safety instructions
XIX
Festo GDCP−SFC−LACI−CO−EN en 0812NH
Term / abbreviation Meaning
PDO Process data object
PDOs are generally transmitted event−orientated, cyclically or on deĆ
mand. A message can be received and evaluated simultaneously by all
slaves. The assignment of application objects on a PDO takes place
with PDO mapping".
In a PDO the values of several objects can also be transmitted and the
recipients of the PDOs can use only parts of the data depending on
their PDO mapping entries.
SDO Service data object
SDOs are used mainly for transmitting acyclic data, e.g. for initialising
during the boot procedure. With SDOs you can access all entries in the
Object Directory. The relevant Object Directory entries can be adĆ
dressed with the index and subindex of the entry. Within an SDO only
one object can be accessed. A reply is always sent to an SDO: A pair of
CAN telegrams per object are transmitted.
Terminating resistor Resistor for minimising signal reflections. Terminating resistors must be
installed or switched in at the end of bus segment cables.
Tab. 0/2: Index of CANopen terms and abbreviations