ABB 07AC91, Руководство по эксплуатации

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Advant Controller AC 31 / Issued: 01.99
7 – 1 Diagnosis
3
7 Diagnosis
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
7.1 Types of errors detected
The errors detected can be divided into four classes.
Class 1 errors:
Fatal error
Class 2 errors:
Serious error
Class 3 errors:
Light error
Class 4 errors:
Warnings
Access to the Flash EPROM
is no longer assured.
- Flash EPROM checksum
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
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
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
- Cut wire
*1
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
the bus
*2
*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.