Siemens SINAMICS S120 Function Manual page 574

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Safety Integrated basic functions

9.3 Safety instructions

Drive coasts down with STO or STOP A

The category 0 stop function in accordance with EN 60204-1 (STO or STOP A to Safety

Integrated) means that the drives are not decelerated but instead coast to standstill (the

time required to coast to standstill depends on the kinetic energy). This must be included in

the logic of the protective door lock, for example, by means of logic operation of "SSM with

encoder (n<nx)". For Safety without encoder, you need to use other measures to ensure

that the protective door remains locked until the drive has come to a standstill.

No detection of parameter assignment errors by Safety Integrated functions

Safety Integrated functions cannot detect parameterization errors made by the machine

manufacturer. The required level of safety can only be assured by careful acceptance

Different responses of the Safety Integrated functions when replacing a Motor Module or a

Motor Modules or the motor must be replaced with a device of the same type, as the

parameter settings will otherwise lead to an incorrect response of the Safety Integrated

functions. The corresponding drive must be re-calibrated after an encoder is replaced.

Parameterized safety functions when an internal or external fault occurs only available to a

limited extent

If an internal or external fault occurs, none or only some of the parameterized safety

functions are available during the STOP F response triggered by the fault. This must be

taken into account when a delay time between STOP F and STOP B is parameterized. This

applies in particular to vertical axes.

Changing the EDS with safe motion monitoring

An encoder which is used for Safety functions must not be switched over when a data set is

switched over.

The Safety functions check the safety-relevant encoder data for changes when data sets are

switched over. If a change is detected, fault F01670 is displayed with a fault value of 10,

which results in a non-acknowledgeable STOP A. The safety-relevant encoder data in the

various data sets must therefore be identical.

Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3

Drive functions

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