Rockwell Automation 57C435 Processor Module, AutoMax - Manual (Page 29)

5Ć3
on thebattery holder. If noneof theaboveactions correct the
problem, replace the battery.
5.3 BUS ERROR
Problem: Codes 31" or 50" through 58" appear on the Processor
module's LEDs. These codes signify that a bus error occurred when
the system attempted to access an I/O module. The possible causes
of this error arethefollowing: a missing module, a modulein the
wrong slot, or a malfunctioning module. It is also possible that the
user has attempted to write to the wrong registers on a module
through an application task. Usethefollowing procedureto isolatea
bus error:
Step 1.
Determine where the bus error occurred.
Connect the personal computer to the rack and run the
ReSource AutoMax Programming Executive. Display the
error log for the Processor that indicates the error. The
error log should indicate the address that caused the bus
error or a line number in a BASIC or Control Block
application task. Theaddress will bedisplayed in
hexadecimal notation. To decode the address, follow the
directions below.
a. To determine the slot number where the bus error
occurred, convert the hex address into a bit pattern
and decode in decimal notation as follows:
Most Significant 16 Bits
31 30 29 28 27 26 25 24 22 21 20 19 18 17 16 23
0 0 0 0 1 0 BYTE
BIT #
THIS RACK
SLOT #
0 = Forced
1 = Unforced
BIT