What is the meaning of the Twin-CAT diagnostic message BoxState with S300/S700 via CAN?

SDO data mismatch at StartUp SDO-Upload Error 0x 1800, SI 1: expected value: 0x181, received value: 0x40000181 From Firmware 2.51 the behavior referring to the COB-ID has been adapted to the CAN standard.

As long as TwinCAT isn't updated, the former S300/S700 behavior can be reset by setting BUSP1=1.