Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 89)

6Ć5
6.7 Error Code A is on the Remote I/O Head or
Remote Drive Interface Head 7ĆSegment
Display
Problem: Error Code A appears on the sevenĆsegment display of the
Remote I/O Head (or Remote Drive Interface Head) at powerĆup. This
error code indicates an invalid drop number. This will occur only if the
drop number on the thumbwheel switch is 0, 8, or 9. Use the
following procedure to clear the error code:
Step 1.
Set the correct drop number on the thumbwheel switch.
Step 2. Cycle power to the Remote I/O Head or Remote Drive
Interface Head.
WARNING
IN APPLICATIONS WHERE IT IS IMPERATIVE THAT OUTPUT DEVICES BE
DISABLED OR DEĆENERGIZED WHEN THE DROP FAILS, IT IS RECOMMENDED
THAT THE SUPPLY POWER TO THE OUTPUT DEVICES BE ROUTED THROUGH
THE READY RELAY ON THE REMOTE I/O HEAD POWER SUPPLY. FAILURE TO
OBSERVE THIS PRECAUTION COULD RESULT IN BODILY INJURY.
6.8 The Remote I/O Head's Rail Fault LED
is On
Problem: The RAIL FAULT LED on the Remote I/O Head faceplate is
on. This indicates that there has been a loss of communication
between the Remote I/O Head and one of the Local Heads or Rails
connected to the I/O ports.
The FAULT MSB and FAULT LSB LEDs will display a binary code that
indicates which of the ports has had an interruption in
communication (rail fault). Refer to figure 6.1.
FAULTMSB LED OFF OFF ON ON
FAULTLSB LED OFF ON OFF ON
Rail Fault on port 0 1 2 3
Figure 6.1 Ć AutoMax Rail Fault LED Codes
Refer to the Digital I/O Rails and Modules instruction manual
(JĆ 3012) for detailed troubleshooting procedures for I/O Rail failures.