Siemens Sinumerik 840D sl Function Manual page 122

Sinumerik safety integrated

Hide thumbs Also See for Sinumerik 840D sl:

Table of Contents

Safety functions integrated in the system/drive

6.3 Safe Stops A- -F

Safe Stops A- -F

General information

Safe Stops are used to stop drive motion and bring it to a standstill. A distinction is

made between internal and external Stops. The internal Stop responses, initiated

by safety--related functions when limit values are violated, initiate an alarm. The

external stop responses selected by SGEs do not issue an alarm and are acknowl-

edged when the SGEs are deselected.

Stop responses SBH and SH

Fig. 6-5 shows the relationship between the stop responses and the safe operating

stop (SBH) or the safe standstill (SH).

Figure 6-5 Stop responses, safe operating stop (SBH), safe standstill (SH)

A high degree of security against faults/errors is afforded by the two--channel

system structure with its permanent, crosswise data comparison. Alarms and stop

responses are initiated when differences are detected between the two channels.

The purpose of the stop responses is to safely stop the drives in a controlled

fashion according to the actual machine requirements. A differentiation is made

between the stop responses STOP A, B, C, D, E, F and the test stop. The type of

stop response that occurs in the event of a fault/error can either be pre--deter-

mined by the system or configured by the machine manufacturer.

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

Stop - - Category acc. to EN60204 Part 1

Only for active axis- - specific safety function

Setpoint - -

Only under fault conditions

(pulse cancellation)

Retraction - -

(standstill in closed- -loop control)

Sinamics s120