KEYENCE BL-180 - Manual (Page 57)

4.2 Details on Data Communication
49
4.2.4 Read Error Code
If the BL-180 fails to read a bar code, the B-500 sends back a read error code.
The initial setting of the read error code is as follows:
The read error code can freely be changed (within 8 characters).
The BL-180 can be set to send no error code (see page 38).
Header ERROR Delimiter