Siemens SIMATIC S7-1200 System Manual page 1312

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Table of Contents

Online and diagnostic tools

15.1 Status LEDs

Field-side power is off

Not configured or update in progress

Module configured with no errors

Error condition

I/O error (with diagnostics enabled)

I/O error (with diagnostics disabled)

Status LEDs for a signal module (SM)

(Red / Green)

Flashing red

Flashing green

Flashing red

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK

(Red / Green)

Flashing red

Flashing red