Emergency Operating Mode For Drive-Cliq Components - Siemens SINAMICS S120 Function Manual

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Emergency operating mode for DRIVE-CLiQ components

In order to protect the drive system against excessive voltage when the Control Unit or

DRIVE-CLiQ communication fails (e.g. while a spindle is rotating), an autonomous

emergency operating mode (independent operation) is integrated in DRIVE-CLiQ

components for the following functions:

● Chopper mode (for Basic Line Module 20 kW / 40 kW in combination with an external

● Integrated voltage protection for machines with a high kinetic energy (armature short-

● Resumption and re-synchronization of DRIVE-CLiQ communication in emergency mode

● Changeover from emergency operation to normal operation without POWER ON of the

● Defined response with factory setting / project download.

Autonomous (emergency) operation is only possible for Motor Modules and Basic Line

Modules with order numbers which end with the code ..3, e.g. 6SL3130-6TE21-6AA3.

Principle of operation

Two task profiles are obtained for autonomous operation:

● Recognize that a component is getting into a critical state and the protective function

● Restore communication with the higher-level controller.

In order to maintain the protective function, the time-slice system must remain active.

The logged-on time-slice system remains active until the protective functions signal that a

safe state has been reached and the time slices can therefore be deactivated. When

restarting the communication, if the DRIVE-CLiQ master signals that no bus timing changes

have been made with respect to the old parameterization, then synchronization is possible.

The time-slice system remains the same as before.

All algorithms for autonomous operation are executed as a background process for the

component. They thus have no influence on the computer resources utilized cyclically by the

Drive functions

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

braking resistor).

circuit controlled by the Motor Modules on the basis of the DC-link voltage).

when necessary (only if clock cycle conditions have not changed) and without POWER

must be maintained.

12.11 Emergency operating mode for DRIVE-CLiQ components

Basic information about the drive system

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