Hitachi EH-150 Series - Page 64

Chapter6 Communication Mode
6 - 22
Fre
e Protocol
 End of data sending
When EH-SIO sends data properly, completion flag (t+1) will be ON, and H0020 will be set to return code area.
If the transmission of data is failed, error flag (t+2) turns on, and error code is stored in the upper byte of return
code area.