2
Overview
14
Festo – EXCM-30/-40-...-PF-EN – 1603 – English
Manual releasing of the brake
Warning
Unexpected movement of the product. Risk of impact and crushing injuries.
Before manual release of the brake, make sure that the axes are in a stable end
position or secure axes against unexpected movements.
The brake can be manually released when the drive is blocked (either through a pilot signal or an error
with error response “Output stage off ”).
This is possible in the following ways:
–
through a hardware input (
è
3.2.5 Switch-off functions interface [X4])
–
through a control bit in the CCON control word
(
è
5.2.2 Description of the control bytes CCON/CPOS)
–
through the FCT
In the case of a blocked drive, if the command to release is issued over at least one of these signals,
the brake is released.
Note
The signal to release the brake always has priority. If a voltage of +24 V is applied to
the RB input (release brake), the brake is released permanently. In case of error (for
errors with error response “Output stage off ”), the brake remains released, as the
signal for releasing the brake is present:
–
Leave the signal at “brake active” (0 V at the input RB).
–
Release the brake only in a concrete case of need