Efficient Networks Siemens Sinamics S120 - Manual (Page 200)

Basic functions
6.11 Simple brake control
Drive Functions
200
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
● p3845 = 1 Friction characteristic curve recording activated, all directions of rotation
The friction characteristic curve is recorded in both directions of rotation. The results of
the positive and negative measurement are averaged and entered in p383x.
● p3845 = 2 Friction characteristic curve recording activated, positive direction of rotation
● p3845 = 3 Friction characteristic curve recording activated, negative direction of rotation
DANGER
When the friction characteristic is plotted, the drive can cause the motor to move. As a
result, the motor may reach maximum speed.
The emergency STOP functions must be fully operational during commissioning. To
protect the machines and personnel, the relevant safety regulations must be observed.
Commissioning via STARTER
In STARTER, the friction characteristic curve can be started up via the dialog under
"Functions".
6.11 Simple brake control
6.11.1 Features
● Automatic activation by means of sequence control
● Standstill (zero-speed) monitoring
● Forced brake release (p0855, p1215)
● Close the brake for a 1 signal "unconditionally close holding brake" (p0858)
● Application of brake after "Enable speed controller" signal has been removed (p0856)
6.11.2 Description
The "Simple brake control" is used exclusively for the control of holding brakes. The holding
brake is used to secure drives against unwanted motion when deactivated.
The trigger command for releasing and applying the holding brake is transmitted via DRIVE-
CLiQ from the Control Unit, which monitors and logically connects the signals to the system-
internal processes, directly to the Motor Module.
The Motor Module then performs the action and activates the output for the holding brake.
The exact execution control is shown in the SINAMICS S List Manual (FD 2701). The
operating principle of the holding brake can be configured via parameter p1215.