RTR-only synchronous
The RTR-only synchronous mode is activated when receiving a
remote-transmit-request message, i.e. SYNC objects. This transmission type
is only useful for TxPDO. In this situation, the CAN-8x23 will update the DI/AI
value when receiving any SYNC object. And, if the RTR object is received, the
CAN-8x23 will respond to the TxPDO object. The following figure shows the
mechanism of this transmission type.
CAN-8x23 user's manual (Revision 3.20, Mar/08/2012) ------
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