Fail-Safe Function Block F_Load_Monitor; Introduction - Siemens Simatic Manual

Fail-safe function blocks for storage and retrieval machines

3.9 Fail-safe function block F_LOAD_MONITOR

3.9.1

Introduction

The fail-safe function block F_LOAD_MONITOR has the function of guaranteeing safety-relevant over-
load and slack cable detection.
The actual load value is supplied from an analog module and connected measuring source or via the
drive torque value.
Retraction logic is available when detecting a slack cable or an overload condition during operation.
When a slack cable is detected, retraction is monitored so that retraction is only permissible upwards
with a reduced velocity. For an overload condition, retraction is only possible downwards.
The block offers the option of making a distinction between static and dynamic loads, as is the case
when quickly lifting loads.
To check that the measuring equipment is functioning correctly, after a parameterizable interval, the
block requests that a calibration run is performed.
Note
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S7-Distributed Safety/SIMATIC Safety - fail-safe function blocks for storage and retrieval machines