To perform a read operation, enter the information about the coils, inputs, registers, or holding registers you want to control in theRead Registerstable. The first row of the table is already filled in with the register you configured on theConfiguretab.

To set up another register, clickInsert. For each inserted row, click theAddressfield and enter the address of the coil, input, input register, or holding register you want to read values from.

In theRegister Typecolumn, click the down arrow to select the target type to read. You can perform a Modbus read operation on four types of targets: coils, inputs, input registers, and holding registers.

In thePrecisioncolumn, click the down arrow to select the precision. Choose the data format of the register being read from on the Modbus server.

In theNamecolumn, enter a name. A default name is provided, and you can keep it or change it.

Once you have entered all of the fields, clickResume Readsto start reading.

If the read is successful, theRead Valuecolumn fills in with the read value. If you see'ERROR'in theRead Valuefield, adjust the parameters until the read is successful.

To read multiple registers, add rows to the table by clickingInsert在将来发布。添加的新行the table. You can add as many rows as you need. For each row, fill in all of the fields for that read. While you are editing a row, reading is paused, as indicated by thePAUSEDstatus to the left of theResume Readsbutton.

After you set up the table, clickResume Reads.

The reads are performed and the status changes toLIVE. You can also see the read values in the live plot.

If you want to alter the plot, use thePlot Toolssection. You can change the axes, show or hide the legend, and select which registers to display in the plot. The plot changes dynamically when you change any of these factors using the plot tools.