ABB Advant Controller 80 User Manual page 78

Chapter 5 – Diagnostics
General Purpose LEDs
S0 to S7
Table 5-1 S0...S7 fault indications.
Code
(Hex)
05 Bus error - memory
The processor tried to access a nonexistent memory location.
This indicates a serious system software error or defective
hardware.
09 Stall alarm
This is a software problem and indicates that the CPU is not
working correctly. It is probably caused by a CPU overload.
0A Memory test error
The error code appears during the RAM test, which is
performed during system initialization.
0C Instruction set fault
0D Interval timer test failed
0F Bus error test failed
This is a hardware problem and indicates a CPU internal bus
error.
22 START MODE selector in the STOP position
The START MODE selector on the PM820-2 DB element was
in STOP position when the system attempted to restart.
27 Insufficient memory
The CPU could not start the application due to lack of
memory.
42 Overload
The CPU was not able to run the specified control module.
The control module could not be completed within the
specified cycle time and was aborted.
5-2
When LED S7 is on, LEDs S0 to S6 display a status code (given in
Chapter 2).
When the special purpose LED F is on and S7 is off, an error code is
indicated by LEDs S0 to S6 as shown in the table below. The LEDs on
the left (S4 to S6) show the higher nibble of the error code, while those
on the right (S0 to S3) show the lower nibble.
Error indication examples:
05h (Bus error)
F R
B P
T1
T2
S7 S3
S6
S2
S5
S1
S4 S0
Cause
49h (Internal error)
F R
B P
T1
T2
S7 S3
S6
S2
S5
S1
S4 S0
Remedy
Restart CPU and run application again. If error occurs again,
replace the CPU module PM820-2.
Restart the system in STOP MODE.
Extend the cycle times of execution units in the PC program
or remove one or more execution units, e.g., control modules,
and load and deblock the application again.
Replace the CPU module PM820-2.
Replace the CPU module PM820-2
Replace the CPU module PM820-2.
Replace the CPU module PM820-2.
Restart the system with START MODE selector in either the
CLEAR or AUTO position.
Restart the system in STOP MODE. Then remove all loaded
but unused options which may consume memory by loading
BASE software. Enable only necessary options and restart
the system by pressing the INIT push button with the START
MODE selector in CLEAR position.
Restart the system in STOP MODE. Then reduce the load by
extending the cycle times, for example, of control modules in
the PC program or remove one or more execution units, e.g.,
control modules. Load and deblock the application again.
AC 80 User's Manual