Integration And Segregation - Siemens Second Wind Function Manual

Fail-safe operation of the mobile panel 277f iwlan

Table of Contents

Overview and definition of terms

1.4 Integration and segregation

1.4

Integration and segregation

Introduction

In fail-safe operation a safety program runs in the F-CPU. This safety program

communicates with the HMI device. The F-CPU monitors this communication for errors and

analyzes the signals. The terms "integrate" and "segregate" refer to the integration and

segregation of the HMI device in/from the safety program of the F-CPU.

Integrate

If the HMI device is configured for the safety program then when the HMI device starts it is

automatically integrated in the safety program. The integration process is concluded as soon

as the LED"SAFE" is illuminated.

The emergency stop button is active as soon as the HMI device is integrated.

Segregation

Segregation means the desired segregation of the HMI device from the safety program.

The operator has the following alternatives for segregating the HMI device:

● The operator terminates the project.

● The operator presses the ON/OFF button for longer than 4 seconds. After the

When the operator segregates the HMI device there are no side effects, e.g. a global

rampdown. When the segregation process is terminated the LED "SAFE" and the

emergency stop button are no longer active.