dl-breadcrumbs__homedl-breadcrumb-item__separatorConfiguration and programmingdl-breadcrumb-item__separatorDiagnosis and debuggingdl-breadcrumb-item__separator...dl-breadcrumb-item__separatorThe diagnosis system dl-breadcrumb-item__separatorStructure of error numbersdl-breadcrumb-item__separatorError severity
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Error severity

Error severity

Type

Description

Example

1

Fatal errors

Safe operation of the operating system is no longer ensured.

Checksum error in system flash, RAM error

2

Severe error

The operating system works correctly, but the error-free execution of the user program is not ensured.

Checksum error in user flash memory, task cycle times exceeded

3

Minor errors

It depends on the application whether the user program has to be stopped by the operating system or not. The user decides which reaction is to be done.

Flash memory cannot be programmed, I/O module failed

4

Warnings

Errors that occur on peripheral devices or that will have an effect only in the future. The user decides which reactions are to be done.

Short circuit in an I/O module, battery empty/not installed

11

Parameter error

Error occurred during parameter setting

Different I/O devices in PLC configuration and hardware installation

Errors with error severitiy 1 - fatal errors

Errors with error severitiy 1 - fatal errors

Errors with error severity 1 are not entered in the diagnosis system. These errors do not allow normal operation of the PLC. These errors are detected during PLC start-up and stop the PLC immediately.

Examples are RAM errors or checksum errors when starting the firmware.

Such errors are indicated by rapid flashing of the ERR LED.