Problem Releasing The Robot Brakes - ABB Robotics OmniCore C90XT 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 C90XT
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
Contactor
Q1 & Q2
Brake signal
X2
Power unit
A1
xx1800001835
Product manual - OmniCore C90XT
3HAC073706-001 Revision: E
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.
Robot signal
exchange
proxy K2
X6 X7
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7.2.4 Problem releasing the robot brakes
Note
3HAC065464-009
Motor connector
Brake signal
X1
7 Troubleshooting
Manipulator
Floor cable
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