Problem Releasing The Robot Brakes - ABB OmniCore V250XT Type B Product Manual

7.2.4 Problem releasing the robot brakes

Description
When starting robot operation or jogging the robot, the internal robot brakes must
release in order to allow movement.
Required test equipment
Equipment needed for troubleshooting:
Equipment
Multimeter
Insulating gloves
Circuit diagram - OmniCore V250XT, rev 04
or later
Preparations
1
2
Recommended working procedure
If the brakes do not release, no robot movement is possible and a number of error
log messages can occur. Use this procedure to troubleshoot what might cause the
problem.
Look at the following block diagram to understand how power is connected from
incoming and forward.
Block diagram
T
xx2100001141
Product manual - OmniCore V250XT Type B
3HAC087112-001 Revision: A
Action
Make sure that the controller is switched on.
Wait 30 s - 1 min to enable start-up sequence.
Check the FlexPendant for errors and warnings.
DANGER
Troubleshooting on the controller while powered on must be performed by personnel
trained by ABB or by ABB field engineers.
Power unit
A1
24V_BRAKE_PWR
X11
X13
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7.2.4 Problem releasing the robot brakes
Note
3HAC074000-008
Main drive unit
T4
24V_BRAKE_REL
X15
7 Troubleshooting
Motor connector
Manipulator
Floor cable
X1
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