ICP DAS USA CAN-8823 User Manual page 35

Canopen slave device
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Inversely, the cyclic synchronous transmission mode is triggered by the
reception of an expected number of SYNC objects, and the max number of
expected SYNC objects can be 240. For example, if the TxPDO is set to
response when receiving 3 SYNC objects, the CAN-8x23 will feed back the
TxPDO object according to the set. For the RxPDO, actuating the DO/AO
channels by the RxPDO is independent of the number of SYNC objects. These
concepts are shown in the figures below.
CAN-8x23 user's manual (Revision 3.20, Mar/08/2012) ------
35

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