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3 plc error messages – NORD Drivesystems BU0550 User Manual

Page 93

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4 Frequency inverter details

BU 0550 GB-0813

93

4.3 PLC Error messages

Error messages cause the frequency inverter to switch off, in order to prevent a device fault. With PLC error
messages execution by the PLC is stopped and the PLC goes into the status "PLC Error". With other error
messages the PLC continues operation. The PLC restarts automatically after the error has been
acknowledged.

The PLC continues to operate with PLC User Fault 23.X!

Display in the
SimpleBox

Fault

Text in the ParameterBox

Cause

Remedy

Group

Details in
P700[-01] /
P701

E022

22.0

No PLC program

The PLC has been started but there is no PLC program in
the FI

- Load PLC program into the FI

22.1

PLC program is faulty

The checksum check via the PLC program produced an
error.

- Restart the FI (Power ON) and attempt to reload
the PLC program

22.2

Incorrect jump address

Program error, behaviour as for Error 22.1

22.3

Stack overflow

More than 6 bracket levels were opened during the run time
of the program

- Check the program for run time errors

22.4

Max. PLC cycles exceeded

The stated maximum cycle time for the PLC program was
exceeded

- Change the cycle time or check the program

22.5

Unknown command code

A command code in the program cannot be executed
because it is not known.

- Program error, behaviour as for Error 22.1
- The PLC version and the NORDCON version do not match

22.6

PLC write access

The program content has been changed while the PLC
program was running

22.9

PLC General error

The cause of the fault cannot be precisely determined

- Behaviour as in Error 22.1

E023

23.0 … 23.7 PLC User Fault 1 … 8

This error can be triggered by the PLC program in order to
externally indicate problems in the execution of the PLC
program. Triggered by writing the process variable
"ErrorFlags".

E024

24.0 … 24.7 PLC User Fault 9 … 16

Table 111 PLC error messages