Modbus Master Simulator

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Modbus Poll

Modbus Poll is a Modbus master simulator designed primarily to help developers of Modbus slave devices or others that want to test and simulate the Modbus protocol. With the multiple document interface you can monitor several Modbus slaves and/or data areas at the same time. For each window you simply specify the Modbus slave ID, function, address, size and poll rate. You can read and write registers and coils from any window. If you want to change a single register, simply double click the value. Or you can change multiple registers/coils. Multiple data formats such as float, double and long with word order swapping are available.

Exception errors are shown on the status line.

If you are a slave developer you can compose and send your own test strings in the "test center" and check the result from the slave in hex numbers.

OLE Automation for interfacing with Visual Basic, Excel etc. To interpret and show the Modbus data according to your specific requirements. E.g. edit data in Excel and then transmit the data to your slave device! Try the Excel example.xls installed with the program.

Supported protocol variants:

Modbus RTU
Modbus ASCII
Modbus TCP/IP
Modbus RTU Over TCP/IP
Modbus ASCII Over TCP/IP
Modbus UDP/IP
Modbus RTU Over UDP/IP
Modbus ASCII Over UDP/IP

MODBUS POLL Technical Facts and Features:

OLE Automation means easy interface to Visual Basic, use it almost like an ActiveX component. See VBExample.vbp

Read/write of up to 125 Registers

Read/write of up to 2000 Inputs/Coils

Test Center (Compose your own test strings)

Print and print preview

Monitoring of serial data traffic

Data logging to a text file

Data logging direct to Excel

Context sensitive help

10 Display formats such as float, double etc.

Adjustable Address Base (0 or 1).

Font and color selection.

Broadcast (slave ID 0).

Easy control of RS-485 converters with RTS toggle.

SUPPORTED MODBUS FUNCTIONS:

01: Read coil status

02: Read input status

03: Read holding register

04: Read input registers

05: Force single coil

06: Preset single register

15: Force multiple coils

16: Preset multiple registers

17: Report slave ID

22: Mask write register

23: Read/Write registers

Read the quick start guide here.

Download

Modbus Poll user manual