Baldor Modbus Plus Bedienungsanleitung PDF herunterladen (Seite 14)

AN00174-001 Modbus TCP Fieldbus Option for MotiFlex e100.doc

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Now when we read the Process Data from the drive the data view area displayed the following

result (note that the MiniHMI software automatically displays only registers 256 and 258)…

Because we are now using 32-bit data we are able to load full 32-bit values into our Integer

NetData values on the drive….

Using Modbus/TCP it is also possible to transfer floating point data. Switch to WorkBench v5.5

and edit the NetData spy entries for Channels 3 and 4 so their data type becomes Float.

Now enter some floating point data via the Spy window (we used 123.45 and -123.45)…

Writing Process Data

Using the Write Registers page of the MiniHMI application we set the following parameters:

Now change the Data Format in the MiniHMI application

to FLOAT (leaving the Address and Quantity set to 256

and 2 respectively). Click on the Synch Read button and

the client now displays the correct floating point values

in registers 256 and 258…

We selected Multiple (Holding) registers as the

memory type as these are the registers that PDO

data is mapped to (see Modbus/TCP Register

Implementations earlier).

Modbus register 0 is the first register in the Read

Process Data area (data written by the client). We

have set the quantity of registers to write to 4

(i.e. registers 0 to 3). We know from our read

tests 4 registers will be needed to write 2 values.

Note that the data format initially is INTEGER (i.e.

16 bit data) and the addressing is zero based.

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Baldor Modbus Plus Bedienungsanleitung Seite 14