Rockwell Automation 1395 Discrete Adapter, Rev 3.XX-8.XX - Manual (Page 33)

Chapter 6
Troubleshooting and Maintenance
6-2
Discrete Fault Messages
The fault messages available on the Discrete Adapter Board are:
S DS-01-DISCRETE OK
Indicates no faults are present in the Adapter.
S DS-31-ILLEGAL FAULT – Hard Fault
Indicates an Internal Adapter error. Replace Discrete Adapter.
S DS-54-DP HANDSHAKE – Soft Fault
The 1395 Main Computer Board is no longer maintaining
communications with the Adapter through Dual-Ported RAM. Ensure
proper connection to Microbus interface. Replace Adapter Board,
replace Main Board.
S DS-64-ILLEGAL MODE – Soft Fault
The 1395 Main Computer commanded an illegal mode for this Adapter.
Clear Fault, replace Adapter, replace Main Board.
Adapter Troubleshooting
Each processor or Adapter provides it’s own set of sophisticated
diagnostics which the user can examine to help determine the nature of
problems that may arise. Maintenance is done at the board level.
Examining the diagnostic/fault messages available determines whether a
board should be replaced. The malfunctioning board may be returned to
Allen-Bradley for further disposition.