American Magnetics 4Q1010PS-430 Integrated Power Supply System - Manual (Page 151)

Rev. 5 133
Remote Interface Reference
Error Messages
same number of data bits, stop bits and parity as the Model 430
Programmer (8 data bits, 1 stop bit and no parity).
•
-404,”Serial data overrun”
The received buffer of the Model 430 Programmer was overrun. Verify that
the host device has hardware handshaking (RTS/CTS) enabled.