Diagnostics Of The Analog Modules - Siemens SIMATIC S7-300 Reference Manual

Programmable logic controllers module data

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Connecting Loads to a Current Output of a Non-Isolated AO

Diagnostics of the Analog Modules

Programmable and Non-Programmable Diagnostic Messages

In diagnostics, we make a distinction between programmable and

non-programmable diagnostic messages.

You obtain programmable diagnostic messages only if you have enabled

diagnostics by parameter assignment. You perform parameter assignment in the

"Diagnostics" parameter field in STEP 7 (refer to Section 4.7).

Non-programmable diagnostic messages are always made available by the analog

module irrespective of diagnostics being enabled.

Actions following diagnostic message in STEP 7

Each diagnostic message leads to the following actions:

• The diagnostic message is entered in the diagnosis of the analog module and

forwarded to the CPU.

• The error LED on the analog module lights.

• If you have programmed "Enable Diagnostic Interrupt" with STEP 7, a

diagnostic interrupt is triggered and OB 82 is called (refer to Section 4.17).

Programmable Logic Controllers S7-300 Module Data

A5E00105505-03

Analog Modules

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