Rockwell Automation SA3100 Power Module Interface (PMI) Regulator - Manual (Page 50)

4-4 PMI Regulator
4.3 Flex I/O Error Detection
The PMI Regulator’s I/O Fault LED (I/O FLT) will light to indicate that communication
between Flex I/O and the PMI processor has been disrupted, or that Flex I/O has
been configured but is not plugged in.
Registers 0-23 in the UDC module are used for Flex I/O configuration and
diagnostics. Register 10/22 provides Flex system status, as well as Module 0 and
Module 1 status and error codes. Register 11/23 provides Flex Module 2 error codes.
If a Flex I/O communication problem is detected, bit 13 in the Drive Warning register
(203/1203) will be set.
Flex I/O errors do not cause the drive to shut down. The user must ensure that the
application task tests the Flex I/O error code registers and forces appropriate action in
the event of a Flex I/O error. In case of error, check wiring and connections. Replace
the Flex I/O module if errors reoccur.
Refer to the SA3100 Drive Configuration and Programming instruction manual
(S-3056) for a description of the Flex I/O status and error bits.