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There are two ways to map Modbus registers to RTU point addresses. Both are set up using SCADAPack E Configurator.
The value of system point 58501 determines which address mapping method is used
The table below summarizes the data types that can be assigned to each point type in SCADAPack E Configurator when customized address mapping is used.
|DNP3 Point Type||Supported Modbus Data Types||Additional Information|
|Analog points are one of the following:
|Binary||BOOL (DISCRETE)||Binary points are packed into 8-bit values where the least significant bit represents low discrete numbers per Modbus FC=01.|
|Counter points are unsigned quantities up to 32 bits.
INT and DINT data types are not supported because signed numbers do not fit inside unsigned quantities.
1. Verify that you are using SCADAPack E Configurator 8.11.1 or greater and that firmware 8.11.1 or greater is installed on the SCADAPack E. Perform, a refresh on the status page while connected the the RTU and check the "About" dialog box of the software
2. Verify that system point 58501 is NOT set to 0.
3. In SCADAPack E Configurator, set the Modbus Slave/Server method to either 5 digit or 6 digit addressing
The automatic method is the legacy method and is on by default. Information on how to configure 32bit mapping and the mapping structure can be found in the technical help manuals installed with SCADAPack E Configurator