Diagnostic Interrupt; Reading Diagnostic Information From A Pg - Siemens Simatic SM331 Getting Started

Diagnostic interrupt

8.1

Reading diagnostic information from a PG

Overview
Diagnostic interrupts enable the user program to react to hardware errors.
Modules must have diagnostic capabilities in order to generate diagnostic interrupts.
In OB82 you program the reaction to diagnostic interrupts.
Display
The analog input module SM331 AI8x12 has diagnostic capabilities.
Diagnostic interrupts that occur are signaled by the red "SF" LED on the SM331 and on the
CPU.
Figure 8-1
SM331; AI 8x12 Bit Getting Started part 1: 4 -20mA
Getting Started, 11/2006, A5E00253410-02
Hardware error
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