WAGO-I/O-SYSTEM 750
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch
If, for example, SI3 points to the last acknowledged message in SI11, then the
next unacknowledged diagnostic message, which is stored in SI12, is
acknowledged by writing 12 in subindex 3.
In case a value other than the subindex number of an unacknowledged message
is written in SI3, the write access is denied by SDO Abort Code 0x06090030.
In case there are no unacknowledged messages, the write attempt is likewise
denied by SDO Abort Code 0x06090030.
Function Description 101
Manual
Version 1.2.1