2.3 Tips and tricks while troubleshooting
2.3.1 Troubleshooting strategies
Isolate the fault!
Any fault may give rise to a number of symptoms, for which error event log
messages may or may not be created. In order to effectively eliminate the fault, it
is vital to distinguish the original symptom from the consequential ones.
A help in isolating the fault may be creating a historical fault log as specified in
section
Make a historical fault log! on page 37
Split the fault chain in two!
When troubleshooting any system, a good practice is to split the fault chain in two.
This means:
•
identify the complete chain.
•
decide and measure the expected value at the middle of the chain.
•
use this to determine in which half the fault is caused.
•
split this half into two new halves, etc.
•
finally, a single component may be isolated. The faulty one.
Example
A specific IRB 7600 installation has a 12 VDC power supply to a tool at the
manipulator wrist. This tool does not work, and when checked, there is no 12 VDC
supply to it.
•
Check at the manipulator base to see if there is 12 VDC supply. Measurement
show there are
no
12 VDC supply. (Reference: Circuit Diagram in the
Product
manual, IRC5
)
•
Check any connector between the manipulator and the power supply in the
controller. Measurement show there are
no
12 VDC supply. (Reference:
Circuit Diagram in the
Product manual, IRC5
)
•
Check the power supply unit LED.
Check communication parameters and cables!
The most common causes of errors in serial communication are:
•
Faulty cables (e.g. send and receive signals are mixed up)
•
Transfer rates (baud rates)
•
Data widths that are incorrectly set.
Check the software versions!
Make sure the RobotWare and other software run by the system are the correct
version. Certain versions are not compatible with certain hardware combinations.
Also, make a note of all software versions run, since this will be useful information
to the ABB support people.
Continues on next page
34
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
© Copyright 2005-2018 ABB. All rights reserved.
2 Introduction to troubleshooting
2.3.1 Troubleshooting strategies
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