Efficient Networks S120 manual Function modules Extended brake control

Models: S120

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Function modules

7.4 Extended brake control

7.4Extended brake control

7.4.1Features

The extended brake control function has the following features:

Forced brake release (p0855, p1215)

Close the brake for a 1 signal "unconditionally close holding brake" (p0858)

Binector inputs for releasing/applying the brake (p1218, p1219)

Connector input for threshold value for releasing/applying the brake (p1220)

OR/AND block, each with two inputs (p1279, r1229.10, p1229.11)

Holding and operational brakes can be activated.

Function for monitoring brake feedback signals (r1229.4, r1229.5)

Configurable responses (A7931, A7932)

Application of brake after "Enable speed controller" signal has been removed (p0856)

7.4.2Description

The "Extended brake control" function allows complex braking control for motor holding brakes and operational brakes.

The brake is controlled as follows (the sequence reflects the priority):

Via parameter p1215

Via binectors p1219[0..3] and p0855

Via zero speed detection

Via a connector interconnection threshold value

For an AC drive with "Safe Brake Relay," the "Safe Brake Control" safety function requires that the type of the brake control must be set, in parameter p1278, to "Brake control with diagnostic evaluation" (p1278 = 0). This parameter is automatically set for booksize components.

7.4.3Commissioning

The extended brake control function can be activated while the commissioning Wizard is running. Parameter r0108.14 indicates whether the function module has been activated.

Unless you change the default settings, the extended brake control function behaves in exactly the same way as the simple brake control function.

Brake control will be activated automatically (p1215 = 1) when the Motor Module has an internal brake control and a connected brake has been found.

If no internal brake control is available, the control can be activated using a parameter (p1215 = 3).

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Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

Page 226
Image 226
Efficient Networks S120 manual Function modules Extended brake control