Rockwell Automation 1395 Digital Reference Adapter Board - Manual (Page 62)

Chapter 7
Troubleshooting
7-2
Digital Reference Faults
The Digital Reference Fault Adapter Board can generate the following
fault indications:
S GA-01-DIG REF OK
Indicates no faults are present in the Adapter.
S GA-60-ILLEGAL Mode – Soft Fault
Indicates an Internal Adapter error. Remove power and then reapply
power. If not solved, replace Digital Reference Adapter. Reapply
power, if not solved, reinstall original Adapter, replace Main Control
Board, reapply power.
S GA-70-DP HANDSHAKE – Soft Fault
The Main Control Board is no longer maintaining communications
with the Adapter through Dual-Ported RAM. Ensure proper
connection to Microbus interface. Remove power and then reapply
power. If not solved, replace Digital Reference Adapter Board.
Remove power and then reapply power, if not solved, replace Main
Control Board.
S GA-71-Mbus RAM Test – Soft Fault
The Drive commanded an illegal mode for this Adapter. Initiate a
CLEAR FAULT command. If not solved, reinstall original Adapter,
replace Main Control Board, reapply power. If not solved, replace
Digital Reference Adapter Board. Remove power and then reapply
power, if not solved, replace Main Control Board.
S GA-81-Digital Reference Output Clamp – Warning Fault
The Digital Reference output is above its maximum value causing
erroneous operation.
– Review parameters 563 and 564
– Review encoder cable wiring, encoder wire may be too close to
power wiring causing noise that may be interpreted as pulses.
S GA-82-Low 24V Power Supply Fault – Warning Fault
The remote 24V DC power supply has malfunctioned. Check fuse on
board, check voltage at terminal strip, etc. Correct external problem,
and then initiate a CLEAR FAULT. If not solved, replace Digital
Reference Adapter.
S GA-83-Two/More Inp to same bit – Soft Fault
Only one input can be assigned to a bit, review programming
parameters.
Adapter Troubleshooting
Each processor or Adapter provides its own set of sophisticated diagnostics
which can help determine the nature of problems that may arise.
Maintenance is done at the board level. The diagnostic/fault codes
determine whether a board should be replaced. The malfunctioning board
may be returned to Allen-Bradley for further disposition.
The test points and board-mounted LED’s can be of assistance in
identifying a problem to a specific area (see
Table 6.B and Table 6.C ).