Hello.

I have to sdo download an octet string of 28 bytes.

Upload apparently works:

$ ethercat upload -p0 -toctet_string 0X210C 0 | xxd
0000000: c800 01e0 0101 0100 0000 0000 0000 0000  ................
0000010: 0000 0000 0000 0000 0000 0000            ............

But trying to write back this octet string with something like

$ ethercat download -p0 -toctet_string 0X210C 0
c80001e0010101000000000000000000000000000000000000000000
SDO transfer aborted with code 0x06070010: Data type does not match, length
of service parameter does not match

does not work.

Do octet strings have some special format for SDO download?

Thanks.

boris
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