Modbus Mapping Function; Operation Of Modbus Mapping Function - Omron MX2 Series User Manual

8 Communications Functions
8-7

Modbus Mapping Function

The 3G3MX2-V1 Series Inverter newly has the 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.
Command from external
communications
Address
Command
(Write to register)
Data
*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.
8 - 24
Communications
terminal
1005 hex
10 hex
0001 hex
Modbus mapping function settings (P200 = 01: Enabled)
External register Data type
P201 P211
1005 hex 01: Signed
Inside inverter
External
register (Connection process)
··· .................................
1000 hex .................................
1001 hex .................................
1002 hex .................................
1003 hex .................................
Data type
1004 hex .................................
conversion
1005 hex
.................................
1006 hex .................................
··· .................................
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Scale Internal register
P221 P301
2.000 1001 hex
Internal
register
···
1000 hex
1001 hex
1002 hex
×
1003 hex
Scale
1004 hex
×
*1
1005 hex
1006 hex
···