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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 Excel. 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.xlsm 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 for easy interface to Excel using Macro language VBA
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 text file
Data logging direct to Excel
Context sensitive help
28 Display formats such as float, double etc.
Adjustable Address Base (0 or 1)
Font and selection
Conditional color selection
Scaling selection
Broadcast (slave ID 0)
Easy control of RS-485 converters with RTS toggle
ENRON/DANIEL Mode
6 digit addresses

Supported Modbus Functions:
01: Read coil status
02: Read input status
03: Read holding registers
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