Epson RC620 Manual page 197

4.2.2.3 Master: Uninitialized Network
Light
OFF
♦ Process Flowchart
Check
 No Problem
 No Problem
 No
♦ Causes of Error
 Electrical surges
 Master device
 Broken master
RC620 Option Fieldbus I/O Rev.8
Master Unit LED
BF ST
Light Uninitialized network
OFF
7
Measure voltage of all
slave power supplies.
No problem
Check for master device configuration.
No problem
Replace the master unit.
Normal Communication?
No
Consult the PROFIBUS manufacturer.
Possible Cause
Measure voltage of the device
of master device power supply at the master unit.
→It should be within the range of
power supply
Check that the master device was
configuration error configured properly.
→After changing the
Replace the broken master unit
unit with a new one.
→Verify whether the problem is
4. Troubleshooting (PROFIBUS DP)
Error
Problem exists. (Fix it.)
Problem exists. (Fix it.)
Yes
Examination Method
sufficient voltage for device
operation.
configuration, verify whether
the problem is fixed.
fixed.
Description
- Master unit power error
- Master unit configuration error
Countermeasure
Check voltage of the
device power supply.
Check the master unit
configuration.
Replace the master unit
with a new one.
Finish
187