modbus poll insufficient bytes received troubleshooting

Read functions are associated with a Modbus Poll document. The following functions do the same as you setup in the read/write definition dialog (F8). Address informationĮxample how to open a Modbus TCP/IP connectionĪpp.Connection = 1 ' Select Modbus TCP/IPĪpp.ResponseTimeout = 1000 ' Wait 1000ms until give up

Socket errorĢ1 = TCP/UDP Connection failed. Connect errorġ7 = TCP/UDP Connection failed. WSA start upġ3 = TCP/UDP Connection failed. Serial port driver did not accept timeout settings.ġ2 = TCP/UDP Connection failed. Serial port driver did not accept port settings.ĥ = Serial port. Not possible to get current settings from port driver.Ĥ = Serial port.

Opens the connection selected with the Connection property.įor error 3-5: Please check if you have the latest serial port driver.ģ = Serial port. The ConnectTimeout specifies the length of time that Modbus Poll should wait for a TCP/IP connection to succeed. The ResponseTimeout specifies the length of time in ms that Modbus Poll should wait for a response from a slave device before giving up. A serial port or one of the Ethernet connections can be selected. The following properties and functions do the same as you setup in the connection dialog (F3).Ĭonnection selects the desired connection. Res = doc1.ReadHoldingRegisters(1, 0, 10, 1000)Ĭells(5, 7) = doc1.ReadResult() 'Show results for the requests Set doc2 = CreateObject('Mbpoll.Document') Set doc1 = CreateObject('Mbpoll.Document') Set app = CreateObject('Mbpoll.Application') Start → All Programs → Modbus Poll → Excel Example This will show one of the windows.Īn example is also included with the Modbus Poll installation. Modbus Poll is hidden but you can show it by uncomment the 'ShowWindow' line. One reading registers and another reading Coils. The Developer tab should now show in the ribbon (right most tab).

On the right pane, under Main Tabs, check the Developer check box.

On the left pane click Customize Ribbon.Note the ribbon is part of the Microsoft fluent user interface. Click popular and then select the show Developers tab in the ribbon check box.Click the Microsoft office button and then click Excel options.You should display the Developer tab or run in developer mode when you want to write macros. to interpret and show the modbus data according to your specific requirements. That means you can use any program that supports VBA (Visual Basic for Applications) such as Visual Basic, Excel etc. This is also called an Automation controller.Īn Automation server is an application that exposes programmable objects to other applications. Automation (formerly known as OLE Automation) makes it possible for one application to manipulate objects implemented in another application.Īn Automation client is an application that can manipulate exposed objects belonging to another application.

Modbus poll insufficient bytes received troubleshooting