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TROUBLESHOOTING
E.OP1 Lit in red
The PROFIBUS communication had been
established (the green LED had been lit), but the
master stopped transmitting data to the option unit
during an inverter stop.
Check the connection and the wiring of the
communication cable.
Communication errors occurred consecutively after
the PROFIBUS communication had been established
(green LED had been ON).
Connect a terminating resistor. If a terminating resistor
has been already connected, check if it is connected
properly.
The PROFIBUS communication had been
established (the green LED had been lit), but the
master stopped transmitting data to the option unit
during an inverter stop.
Check the master ladder, etc., and remove the causes
that disconnect the data transmission between the
master and the option unit.
Operation
Panel Display
on the Inverter
LED on
FR-A7NP
Possible Cause Checkpoint / Troubleshooting