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

braking resistor).

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

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

● Resumption and resynchronization of DRIVE-CLiQ communication in emergency mode

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

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

● Defined response with factory setting / project download.

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

Modules with article numbers that 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 must

be maintained.

● 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

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

DRIVE-CLiQ detailed diagnostics time interval

DRIVE-CLiQ detailed diagnostics individual connection selection

DRIVE-CLiQ detailed diagnostics individual connection error counter

Basic information about the drive system

14.11 DRIVE-CLiQ