Rockwell Automation 61C613 16 Channel Analog Input Module - Manual (Page 30)

5Ć2
5.2 Bus Error
Problem: Error code 31" or 16" appears on the DCS 5000/AutoMax
processor module's LEDs, or register 3764 in the A30 or 15764 in the
A40 indicates a high bit in the corresponding slot. These errors
indicate there was a problem when the system attempted to access
the module. The possible causes of this error are a missing module,
amodule in the wrong slot, or amalfunctioning module. It is also
possible that the user is attempting to write to the wrong registers on
the module. Use the following procedure to isolate a bus error:
Step 1
Verify that the input module is in the correct slot.
Refer to section 4.4.1
Step 2 Verify that the rocker switches have been set correctly.
Refer to table 3.1 for the AutoMate 30/40 or 3.2 for DCS
5000/AutoMax for the correct settings of the address
switches.
Step 3 Verify that the application software has been written
correctly.
Verify that your application program is referencing the
proper module. Refer to the address that corresponds to
the switch settings in table 3.1 or 3.2.
Step 4 Verify that the module can be accessed.
Repeat step 7 in section 3.1. If the module now works you
have a programming problem. Review the examples that
have been provided. If the module does not work, there is
a hardware problem. Proceed to step 5.
Step 5 Verify that the hardware is working correctly.
One at a time, swap out the input module, the processor
module (s), and the backplane. After each swap, if the
problem has not been corrected, replace the original item
before swapping out the next item.