Rockwell Automation 1771-ASB/E Remote I/O Adapter User Manual - Manual (Page 60)

4–4 Troubleshooting
Publication 1771-UM001A-US-P - February 2000
Autoconfigure
For a successful autoconfigure, insure that a processor I/O status file
exists, all rack and reset and inhibit bits are zeroed, and the channel
is set up for scanner, and the baud rate is correct.
Make sure that:
•
the input and output image tables are large enough to
accommodate the rack address you are attempting to assign
•
the adapter and chassis switches are set correctly, especially
communication rate, rack and group.
•
the wiring is correct and properly terminated
•
the remote I/O racks are not split across scanner channels or
the local chassis
If autoconfigure is still not successful, save the program, clear
processor memory by disconnecting the battery, create an I/O status
file, reconfigure the scanner channel, and try again.
1747-SN Scanner
For the adapter to recognized by the 1747-SN scanner module, the
G-files must be properly constructed for rack and starting group and
scanner switches must be set for the correct communication rate.
1756-DHRIO Scanner
For the adapter to be recognized by the scanner module, the adapter
must be added for each logical rack under the scanner module and be
properly configured in the Logix5550 Controller Organizer
configuration tree, and the scanner switches must be set correctly for
remote I/O and node number.
In this chapter you learned how to use the indicators on the front of
the module to troubleshoot your module.
Summary