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<div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;">Hi,<br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br>So there's a possibility that the sync manager would react with datagrams that satisfy the length? A datagram not for the slave but with appropriate length may be supposed to be the datagram corresponding to that slave?<br><br>Best regards,<br><br><div style="font-family: arial,helvetica,sans-serif; font-size: 13px;"><br>Hi <br><br>>When reading the EtherCAT Master documentation about FMMU, I meet this sentence: "In order to >make a sync manager react on a datagram accessing its memory, it is necessary to access the last byte >covered by the sync manager." <br><br>>I do not understand: which access to the last
byte? Whose last byte? The last byte in the datagram? or EtherCAT
frame?<br>The byte on the last address within the mailbox address range (see configured mailbox size) <br><br>>How can sync manager identify its datagram by just the last byte?<br>By comparing the given address and the size of the transferred data. A master must either write the full size of the mailbox (even if the real payload is much smaller) or it has to write 2 datagrams: One with the real payload, addressed to the start of the mailbox, and an additional datagram that writes just one byte at the end of the mailbox address range.<br> <br>Regards, <br>Martin<br><br></div></div>
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