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4. Troubleshooting (PROFIBUS DP)
4.2.2.1.4 Slave: Physical Error
BF ST
Master LED Condition
Light OFF Red Light Blinking
Absent Slave LED Condition
(Physical error)
Red Light ON No Matter
♦ Process Flowchart
5
No Problem
Check
Finish
Measure voltage of all
slave power supplies.
No
Problem exists. (Fix it.)
No problem
Replace the unit.
Yes
No
Consult the PROFIBUS manufacturer.
Normal Communication?
♦ Causes of Error
Possible Cause Examination Method Countermeasure
{ Electrical surges
of device power
supply
Measure voltage of device
power supply at the trouble
unit.
→ It should be within the
range of sufficient voltage
for device operation.
Check voltage of the
device power supply.
{ Broken unit Replace the trouble unit with
a new one.
→ Verify whether the
problem is fixed.
Replace the unit with a
new one.
Fieldbus I/O Rev.6 123