Safety Functions Integrated In The System/Drive; Safe Standstill (Sh) - Siemens Sinumerik 840D sl Function Manual

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Safety functions integrated in the system/

This Chapter describes the safety function safe standstill (SH), controlled from the

safety--related motion monitoring functions. The function is based on the safety

functions STO/SBC of the drive (see Chapter 4). Fig. 6-1 shows the

interrelationships.

The safety functions STO, SBC and SS1, integrated in the drive, controlled via the

drive terminals, are described in Chapter 4. Control via terminals and from the

motion monitoring functions is in parallel and can be used independently of one

A Stop A/STO initiated in the drive (i.e. a system error in the drive or

STO/SBC/SS1 selection via terminal) is however not available as two--channel

SGA "STOP A/B active" for the safety--related motion monitoring functions. There

is only a single--channel signal "pulses cancelled" present.

The safe standstill function is based on the pulse cancellation function integrated in

the Motor Modules of the SINAMICS S120 (start inhibit) (see Chapter 4.3 "Safe

Torque Off (STO)".

There are two shutdown paths that are independent of one another that ensure

that when a component fails, the drive is always brought into a safe condition.

The safe standstill function safely disconnects the energy feed to the motor in the

event of a fault or in conjunction with a machine function.

The following must be carefully observed when controlling/energizing SH from the

motion monitoring functions.

-- The safety functions STO/SBC/SS1 integrated in the drive are, correspon-

ding to the description in Chapter 4 "Safety Functions Integrated in the

Drive" fully effective (parameters, alarms etc.). The standard pre--assign-

ment (default setting) of the associated parameters is generally sufficient in

the context of the motion monitoring functions.

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

Sinamics s120