Modbus Poll Quick start guide
Overview
Modbus
Poll uses a multiple windows user interface. That means you can open
several windows showing different data areas or data from different slave
ID’s at the same time. You can write any text in the Alias cells.
In
any dialog box you can press the F1 key for more help on that specific
topic.
This picture shows two open windows one reading 10 holding registers from address 0 and one reading 10 holding registers from address 100.
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If your slave device allows you to change a Holding register then you double click the cell or just start typing a new value in the cell. Then an edit dialog box is shown. |
Change the read/write definition
To change the read/write definition of a window you can press F8 or select “read/write definition” from the Setup menu.
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Here you define which data to show in the window. This setup shows how to read 10 Holding Registers from address 0. Address 40001 in some protocol descriptions. Note that Modbus Poll uses Modbus addresses which always counts from 0. |
| Device address | MODBUS address | Description | Function | R/W |
|---|---|---|---|---|
| 1...10000* | address - 1 | Coils (outputs) | 0 | Read/Write |
| 10001...20000* | address - 10001 | Discrete Inputs | 01 | Read |
| 40001...50000* | address - 40001 | Holding Registers | 03 | Read/Write |
| 30001...40000* | address - 30001 | Input Registers | 04 | Read |
How to make a connection
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This connection uses a serial port for Modbus RTU communication. 5
different connection types are available however only 2 of them are
standard Modbus connections:
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More features
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Log data to a text file
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Log data directly to Excel sheet
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View communication traffic
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Test center for test with custom test strings
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Display in many formats such as Hex, binary, float etc.