Mitsubishi Electric 800 Series Instruction Manual (Function page 264

*3 If the communication option is not installed, switching to the NET operation mode is not possible.
*4 When Pr.551 = "9999", the priority of the PU control source is defined as follows: USB connector > PU connector / Ethernet connector > operation
panel.
11.3 Start command source and frequency command source during communication operation
11. (D) Operation Command and Frequency Command
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