Safe Stop 1 (Ss1, Time-Controlled); Ss1 (Time-Controlled) With Off3 - Siemens SINUMERIK 840D sl Function Manual

Safety integrated

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Table of Contents

Parameter overview (see Chapter "Parameter overview (Page 395)")

● p0799 "CU inputs/outputs, sampling time"

● r9780 "SI monitoring clock cycle (Control Unit)"

● r9880 "SI monitoring clock cycle (Motor Module)"

Internal armature short-circuit with the "Safe Torque Off" function

The function "internal armature short-circuit" can be configured together with the "STO"

When simultaneously selected, the STO safety function has priority. If the STO function is

initiated, then an activated internal armature short-circuit is deactivated.

Safe Stop 1 (SS1, time-controlled)

General description

The "Safe Stop 1" (SS1) function allows the drive to be stopped according to EN 60204-1,

Stop Category 1. The drive decelerates with the OFF3 ramp (p1135) once "Safe Stop 1" is

selected and switches to "Safe Torque Off" (STO) once the delay time set in p9652 has elapsed.

Once the SS1 (time-controlled) function has been selected by parameterizing a delay in p9652,

STO can no longer be selected directly via the terminals.

Functional features of Safe Stop 1

SS1 is enabled by p9652 (delay time) not equal to "0".

● The function can be selected only in conjunction with Safe Torque Off.

● When SS1 is selected, the drive is braked along the OFF3 ramp (p1135) and STO/SBC

are automatically initiated after the delay time (p9652) has expired.

After the function has been selected, the delay timer runs down - even if the function is

deselected during this time. In this case, after the delay time has expired, the STO/SBC

function is selected and then again deselected immediately.

Safety Integrated

Function Manual, 12/2017, 6FC5397-4BP40-6BA1

Safety Functions integrated in the drive

5.4 Safe Stop 1 (SS1, time-controlled)