Diagnosis; Types Of Errors Detected - ABB 07CR41 Operating Manual

7

Diagnosis

7.1 Types of errors detected

Class 1 errors:
Fatal error
Access to the Flash EPROM
is no longer assured.
- Flash EPROM checksum
error
Advant Controller AC 31 / Issued: 01.99
The aim of diagnosis for the 40 and 50 series basic units is to ensure a rapid and efficient
localization of potential errors.
Figure 1: LEDs for detecting errors
The errors detected can be divided into four classes.
Class 2 errors:
Serious error
The operating system
functions correctly but the
execution of the user program
is not guaranteed.
Detected errors:
- Defective RAM
- Too many timers are active
at the same time
*1 Error detected if prior configuration by programming with the CS31CO block.
*2 An error detected if a certain number of remote units is anticipated in KW 0,9.
Class 3 errors:
Light error
Communications error.
Whether the program is
stopped, depends on the
user's configuration settings
for the application in
question.
Detected errors:
- Disconnected unit
- Bus error
- NCB/NCBR error
- Cycle time too short
- Addressing error
7 – 1 Diagnosis
Class 4 errors:
Warnings
Errors which occur on the
units or syntax errors whose
effects will only become
apparent later. The user
decides which actions to
initialize for the application in
question.
- Internal unit error
*1
- Cut wire overload, short
circuit
- Analog output level error
- Defective 10 V output
- Programming error in
connection with the program
size, program syntax,
subroutine or interruption
- Too many historical values
- The master did not
recognize all the devices on
*2
the bus
3