9 Troubleshooting
Modbus LED status display
118 Lenze · Inverter i510 / i550 - Cabinet · Operation Manual · 0.4 EN · 02/2016
9.3 Modbus LED status display
The Modbus module has
two LEDs (RDY = READY, ERR
= ERROR) on the front cover
to identify the status:
No reception / transmission
Frame reception or transmission
Automatic baud rate detection
9.4 Profibus LED status display
The profibus module has
two LEDs (NS = Status, NE =
ERROR) on the front cover
to identify the status:
Fieldbus deactivated, not initialized, power off or
Firmware download
Connected to master PLC in RUN state, current state is
“data exchange”
Not connected, PLC STOP or no data exchange
Incorrect setting of station address, operation with de-
fault values
PROFIBUS parameterization error
PROFIBUS configuration error