User Manual 08/2003 Edition

5
5 Description of the Functions 02.99 04.01
5.5 SIMODRIVE POSMO A functions
Example:
Motor with
external holding
brake
5-176
Task and assumptions:
A motor with external holding brakes should be used for hanging axes.
The holding brake is to be controlled via output terminal 1.
What other settings are required?
1. Connect the relay to control the motor holding brake to output terminal
1.
2. Assign the ”control external holding brake” function to output terminal
1.
P31 = 95
3. Activate the brake sequence control in the drive.
P56.4 = 0, STW.15 = 0
4. Set the parameters to open the holding brake.
– P58 (holding brake, brake opening time)
The brake opening time must be set so that it is equal to or
greater than the time required to actually open the holding brake.
5. Set the parameters to close the holding brake when ”controller
enable” is withdrawn.
– P59 (speed, close holding brake)
– P60 (holding brake, brake delay time)
The brake delay time (P60) must be harmonized with the speed,
at which the holding brake is closed (P59).
– P61 (holding brake, controller inhibit time)
The controller inhibit time must be harmonized with the time that
it takes to close the brake so that the drive cannot sag.
Example to determine the controller inhibit time
Mark the position of the axis and initiate a fault which results in
the controller enable being withdrawn (e.g. change the setting of
the software limit switch in P6 or P7).
Does the axis sag (drop slightly)?
––> yes, then increase the controller inhibit time (P61)
––> no, then the settings are OK
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SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition