The Operation Mode Does Not Change To The Devicenet Operation Mode; The Inverter Does Not Start Even After Entering The Devicenet Operation Mode; Parameter Write Cannot Be Performed - Mitsubishi FR-E500 Series Instruction Manual

5.2.8 The operation mode does not change to the DeviceNet
operation mode
Check that the inverter and cable are correctly connected.
(Is there any contact failure, disconnection, etc.?)
Check that the node address setting switch is correctly set. (Does the setting
match the program? Is the node address duplicated or outside the range?)
Check that the operation mode changeover program has been executed.
Check that the program mode changeover program is correctly designed.
5.2.9 The inverter does not start even after entering the
DeviceNet operation mode
Check that the operation mode is the DeviceNet operation mode.
Check that the program for starting the inverter has been correctly designed.
Check that the program for starting the inverter has been executed.
Check whether outputs have been made from the inverter.

5.2.11 Parameter write cannot be performed

5.2.10 Parameter write cannot be performed
Make sure that operation is not being performed.
Make sure that you are not attempting to set the parameter outside the setting
range.
Make sure that you are not attempting to set the parameter in the external
operation mode.
Check Pr. 77 "parameter write inhibit selection".
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