Rockwell Automation 1747-ASB Remote I/O Adapter - Manual (Page 104)

Publication 1747-UM006B-EN-P - June 2003
7-8 Troubleshooting
I/O Runtime Fault Codes - Code 4
Code 4
(1) Meaning
I/O Parity Error
Hardware Parity Error or module installed or removed under
power
I/O Module Removed Under Power
File Access Grant Timeout (specialty I/O only)
I/O Module Fault (generic)
I/O Module Reported Error Code
I/O Module Reported Error Code Unknown
Module Inserted Under Power
(1) The fault code is alternated with the corresponding slot number (L slot#).
through