Siemens SINAMICS S120 Manual - Página 17

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SINAMICS S120 Fail-Safe Drives

Overview and operator control

5.1

Hardware overview

The Emergency Stop pushbutton –S3 is released to power-up the system.

The safety function SS1 is de-selected at both drives using reset button –

S4 via output F-DO 0 of the F-CPU; pulse cancellation at the drives is with-

drawn. The drives can then be moved (operated) using the knob-operated

switch –S6.

When safety door 1 is closed (knob-operated switch -S1, ON switch posi-

tion), drive 1 rotates with n=800 rpm. If safety door 1 (switch –S1) is

opened, the data set is changed-over in drive 1 and for drive 1 the setpoint

speed is n=20 rpm. When switch -S1 is opened, the SLS safety function in

drive 1 is activated. By closing safety door 1, a speed of n=800 rpm is again

entered (speed setpoint). Drive 2 is not influenced.

If safety door 2 is closed (knob-operated switch –S2, switch position ON)

then a setpoint speed of n=333 rpm is entered for drive 2. If safety door 2

(switch –S2) is opened, then drive 2 has a speed setpoint of n=33 rpm as

the data set is changed-over. When switch –S2 is open, the SLS safety

function in drive 2 is activated. By closing safety door 2, a speed setpoint of

n=333 rpm is again entered. Also in this case, drive 1 is not influenced.

If safety door 1 (knob-operated switch –S1, center position) is opened, then

the SLS function is activated for drive 1. Drive 2 is not influenced. When

opening safety door 2 (knob-operated switch -S2, center position) the SLS

function for drive 2 is activated.

I DT Safety Integrated

Page 17/43

Entry ID: 28424136

MC-FE-I-005-V11-EN