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Initial Settings And Specifications Of Rs-485 Communication - Mitsubishi Electric FR-CS84-012 Instruction Manual

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 Operation mode switching and communication startup mode (Pr.79,
• Check the following before switching the operation mode.
The inverter is at a stop.
Both the STF and STR signals are off.
Check that the
Pr.79 Operation mode selection
• The operation mode at power ON and at restoration from instantaneous power failure can be selected. Set a value other
than "0" in
Pr.340 Communication startup mode selection
• After the inverter starts up in the Network operation mode, parameter write can be commanded via the network.
• The changed value in Pr.340 is applied after the next power-ON or inverter reset.
• The Pr.340 setting can be changed on the PU in any operation mode.
• When setting a value other than "0" in Pr.340, make sure that the communication settings of the inverter are correct.
Parameters referred to
Pr.7 Acceleration time, Pr.8 Deceleration time
Pr.79 Operation mode selection
Pr.340 Communication startup mode selection
Pr.551 PU mode operation command source selection
5.11.3 Initial settings and specifications of RS-485
Use the following parameters to perform required settings for RS-485 communication between the inverter and a personal
• Communication is available through the PU connector on the inverter.
• Parameter setting, monitoring, etc. can be performed using Mitsubishi inverter protocol or MODBUS RTU communication
• To make communication between the personal computer and inverter, setting of the communication specifications must
be made to the inverter in advance. Data communication cannot be made if the initial settings are not made or if there is
any setting error.
5.11 (N) Communication operation parameters
setting is correct. (Check the setting on the PU of the inverter.) (Refer to
page 93
page 100
page 104
page 105
to select the Network operation mode. (Refer to


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