Name: Siemens SIMATIC S7-300 Module data
Brand: Siemens
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7.4 Position decoder module SM 338; POS-INPUT; (6ES7338-4BC01-0AB0)

S7-300 Automation System Module data

Manual, 08/2006, A5E00105505-04

7-21

7.4.6 Interrupts of SM 338; POS-INPUT

Introduction

This chapter describes the interrupt reaction of SM 338; POS-INPUT. The SM 338 can

trigger diagnostic interrupts.

For detailed information on the OBs and SFCs mentioned below, refer to the

STEP 7

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Help.

Enabling interrupts

There is no default interrupt setting, i.e. interrupts are disabled if not set accordingly.

Program the interrupt enable parameter in

STEP 7

Diagnostic interrupt

If you have enabled diagnostic interrupts, the incoming error events (initial occurrence of the

error) and outgoing error events (message after troubleshooting) are reported by means of

interrupts.

The CPU interrupts user program execution, and executes diagnostic interrupt OB82.

You can call SFC 51 or 59 in OB82 in the user program to view detailed diagnostic data

output by the module.

Diagnostics data remain consistent until the program exits OB 82. The module

acknowledges the diagnostic interrupt when the program exits OB82.

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