Rockwell Automation 1747-PCINT API Software for 1746 I/O - Manual (Page 150)

A–4 Error Codes
Publication 1747-6.5.3 June 1998
If the extended error code is an internal scanner error (0xF0), the slot number is set
to 0 and the first byte of the Error Code Data contains the source of the error. Table
9 lists the internal scanner extended error sources.
Table A.6
Internal Scanner Errors
Error Code: Description:
0x03
Scanner message queue full
0x06 Internal scanner watchdog timeout
0x07
CRC checksum failure
0x09
Invalid message
0x0A
RAM failure
0x0B
Host watchdog timeout