Appendix
General information about the system bus (CAN)
Process data transfer
14
451
EDBCSXA064 EN 3.2
14.7.3.5 Event−controlled process data objects
The event−controlled process data objects are particularly suitable for the data exchange
between controllers and for distributed terminal extensions. They can, however, also be
used by a host system.
X14
X4
X14
X14X14
TPDO2
RPDO2
X4
X4 X4
TPDO2
RPDO2
TPDO2
RPDO2
ECSxS/P/M/A...
ECSXA219
Fig. 14−11 Example: event−controlled process data objects PDO2
The process data objects serve to transmit simple binary signals (e.g. states of digital input
terminals) or complete values in 16 and 32 bits (e.g. analog signals).
Event−controlled process data objects with adjustable cycle time (optional)
The output data is transmitted
ƒ event−controlled if a value changes within the user data (8bytes) or
ƒ cyclically with the cycle time set:
Interface Code
x1 Automation interface (AIF) C2356
X4 ECSxS/P/M: MotionBus (CAN)
ECSxA: system bus (CAN)
C0356
X14 System bus (CAN) C2456
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