To initiate a write request from the device, select the device's window and do one of the following:
Select Write Registers from the Messages menu.
Click thebutton on the toolbar.
The Write Register dialog box opens.
To specify the request:
Enter the polling interval in the Polling Interval field.
Enter the starting Holding Registers memory address where you want to write data in the Starting 4X Register field.
Enter the number of registers to write in the Number of registers to write field.
Enter the data you want written to the registers in the Write Data field.
Step 3. Test Communication.