Yaskawa V7 PROFIBUS-DP - Manual (Page 18)

Installation 1-12
‹ LED Diagnostics
The following table presents the faults displayed by the LEDs on the communication option, their causes, and solutions.
Table 1.8 – LED Diagnostics
LED Display
PWR COM ERR WD
Content Cause Solutions
Power is not being supplied
from the drive.
• Check the main circuit wiring on the drive.
• Cycle drive power.
OFF OFF OFF OFF
Power
OFF
Power is not being supplied to
the option unit due to poor
option unit connection.
• Turn of the drive power.
• Check the option unit connection to the
drive.
• Cycle drive power.
Solid
Green
OFF
Solid
Red Solid
Red CPU
Error
Option unit CPU error.
• Cycle drive power.
• Replace option unit if fault persists.
Solid
Green
OFF
Solid
Red Flashing
Red Drive
Error
Error in Drive unit.
• Cycle drive power.
• Replace V7 PROFIBUS-DP Option if fault
persists
• Replace drive if fault persists.
Solid
Green
OFF
Flashing
Red Solid
Green Com
Error A fault has occurred rendering
communication impossible.
• Check whether the address set in the
PROFIBUS-DP Master differs from the
address of the option unit.
• Check that the master is functioning
properly.
• Check that the termination resistor is
correctly connected to the communication
line.
• Check whether the communication line is
correctly connected (disconnected or poor
connection).
• Check that the communication line is
separated from the main power line.
Solid
Green Solid
Green Flashing
Red Solid
Green Com
Error A fault has occurred rendering
communication impossible.
• Check whether the address is duplicated
with any other devices within the
PROFIBUS-DP network.
Solid
Green Solid
Green
OFF
Solid
Green CPU
Init
Option unit under initialization
• Wait until WD LED is flashing
Solid
Green Solid
Green
OFF
Flashing
Green
Normal
Normal communication
possible.