Mitsubishi CS-40507 Instruction Manual download pdf (Page 18)

3. OPERATION

The operation of the inverter changes slightly when you install this option

unit, as described below.

3.1 Operating Modes

In the PU operating mode, a Parameter Unit (PU) controls the inverter. In

the External-operating mode, the inverter is controlled by external signals

connected to the inverter's terminal block. In the Network (computer link)

operating mode, the inverter is controlled by commands from a Modbus

Plus master.

3.2 Selecting the Operating Mode

The following conditions must also be met before you can change the

operating mode:

• The inverter is stopped.

• The forward and reverse commands are off.

The following table describes the actions required to change the operating

mode.

For all other mode changes, please refer to the Inverter Instruction

Manual.

Pr. 340 allows you to select the Network operating mode on power-up and

after a drive reset. Once the Network operating mode is initiated, there

must be Modbus Plus activity at least once every 3 seconds. If the option

unit does not sense valid Modbus Plus activity for 3 seconds or more, the

inverter performs an option module alarm stop (E.OP3), and you must

reset the inverter to clear this fault.

Mode Change Action Required

Ext Operation → PU Operation

Select the PU operation mode from the

operation panel or press PU key on the

parameter unit.

PU Operation → Ext Operation

Select the EXT operation mode from the

operation panel or press EXT key on the

parameter unit.

Ext Operation → Net Operation

Modbus Plus master writes a 0014h to

Net Operation → Ext Operation

Modbus Plus master writes a 0010h to

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Mitsubishi CS-40507 Instruction Manual Page 18