Epson RC620 Manual page 194

4. Troubleshooting (PROFIBUS DP)
Physical Error
♦ Process Flowchart
Check
 No Problem
 No
♦ Causes of Error
 Electrical surges of
device power supply
 Broken unit
184
Master LED Condition
Absent Slave LED Condition
(Physical error)
5
Measure voltage of all
slave power supplies.
No problem
Replace the unit.
Normal Communication?
No
Consult the PROFIBUS manufacturer.
Possible Cause
Measure voltage of the device
power supply at the trouble
unit.
→It should be within the range
Replace the trouble unit with a
new one.
→Verify whether the problem
Red Light ON
Problem exists. (Fix it.)
Yes
Examination Method
of sufficient voltage for
device operation.
is fixed.
BF
Light OFF Red Light Blinking
No Matter
Finish
Countermeasure
Check voltage of the device
power supply.
Replace the unit with a new
one.
RC620 Option Fieldbus I/O Rev.8
ST