Check out chapter 6:
I believe the PLC-5 will automatically clear the fault bit now that you have the dipswitch setting changed.
If you haven't discovered this already, be very certain your manual for the 1794-ASB matches the revision letter of the actual hardware. AB has changed the function of some of those dipswitches over the years to accomodate 32 point modules and RIUP. That has bitten me before when replacing a series A 1794-ASB module with a series D.
I would also suggest you go to ab.com knowledge base and search on the 1794-ASB. There are tons of problems with these modules that may or may not affect your system, but get familiar with them anyway.
Also, look in RSLogix5 at the channel status tab(s). Figure out which channel is your RIO scanner and find the status file number. If it is zero, then no channel status file has been assigned. If that is the case, you will want to do that to troubleshoot in greater detail.
If you need to create the status file, be sure to use an empty file or create a new one...I think RSLogix will create it for you and size it accordingly when you enter a value in the channel status screen and hit Apply or OK. I think you must be in program mode even if the file exists, or offline and then download...
Once the status file is assigned, you can use it to monitor the health of the RIO link. In the old days, we had to go into the status file and comment the addresses depending on the RIO config, you can still do that, and even use some fo the status bits in your PLC program as interlocks. Nowadays, RSLogix5 will display the contents in a nice handy table for you when you go to the Channel Status dialog.
Hope this helps...
Paul
Another possibility: (technote ID 40165)
Rack Faults When Using a Flex 1794-ASB Series D or E RIO Adapter with a Classic PLC-5 Processor
The 1794-ASB Series D and Series E RIO adapters are NOT compatible with the Classic PLC-5 Processors. Rack faults will result when using this combination of hardware.
The 1794-ASBLT Flex RIO Adapter was developed to provide a version of the RIO adapter that can be used with Classic PLC 5/15 (1785-LT) and 5/25 (1785-LT2) processors. Note: The 5/10 (1785-LT4) and 5/12 (1785-LT3) Classic PLC-5 Processors do not have Remote I/O capability.
Use the 1794-ASBLT Series D adapter when communicating with Classic PLC-5/15 or PLC-5/25 processors via Remote I/O.
The 1794-ASBLT Series D adapter is a replacement for the 1794-ASB Series D adapter ONLY when communicating with PLC-5/15 or PLC-5/25.
Reference Publication No. 1794-IN110A-EN-P
This would apply if you are using a Classic PLC5. Find out if your is Classic or Enhanced based on the part number. These are part numbers for the Enhanced processors:
1785-L11B, -L20B, -L30B, -L40B,
-L40L, -L60B, -L60L, -L80B, -L20E,
-L40E, -L80E, -L26B, -L46B, -L86B