8-7 Modbus Mapping Function
This Modbus mapping function can change up to 10 register addresses.
For example, when designing replacement, you can match the inverter-side register addresses without
changing the communications program.
It is also possible to set the data type, scale, and endian (byte order) of communication data according
to your application.
8-7-1 Operation of Modbus Mapping Function
The Modbus mapping function can set up to 10 register addresses.
This function processes the command, which is sent to the external register address specified from the
external communications, for data in the address set in Modbus Mapping Internal Register.
Even if the data are different between the external and internal registers, it is possible to adjust data by
the settings of Modbus Mapping External Register Type and Modbus Mapping Scaling.
Modbus mapping function settings (P200 = 01: Enabled)
Command from externa
communications
Inside inverter
(Connection process)
……………………………
……………………………
……………………………
……………………………
…
Data type
conversion
… ……………
……………………………
……………………………
*1. The internal register (Modbus register inside the inverter) that overlaps with the external register setting is dis-
abled.
To use that internal register, set an external register not to overlap or set a different Modbus mapping function
to access from a different address.
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