6. Function blocks
6.1 Manufacturer function blocks
The parameters for the 2nd request are used to define the easyE4 marker range for
which function code FC23 will be run. The range's word markers will be either writ-
ten to the Modbus TCP server or read from it and stored in the easyE4's word mark-
ers.
Index 1.
Element:

The address of the first server Modbus TCP map register that is written to. The
value range is 0 to 65535.
Keep the 0-based address system in mind.
If the address range does not match the Modbus server's address
range because the former starts from 0 and the latter from 1, you
will need to use an offset.
In this case, you will need to set the start address to the original
value minus 1.
Alternatively, the option Auto-decrement on all addresses can be
activated with a checkmark.
No. of
Elements

The number of elements that should be written from the easyE4 marker range to
the server's Modbus TCP map.
Depending on the specific function code, "element" may refer to various data
formats.
Marker
assign-
ment

The marker word selected in the Marker assignment field is the starting point of
the marker range for which the function block will run the function codes. The ele-
ments in the easyE4 marker range will be read.
The value range is 1 to 512.
Make sure not to overwrite any registers.
Function block outputs
If you select the EDP programming language, the Function block outputs tab will
appear as well
easyE402/24 MN050009ENEaton.com
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