Modbus Poll

Modbus Poll official version

The official version of Modbus Poll is a modbus development and debugging tool suitable for development workers. Modbus Poll can manage the entire electrical appliance network, starting from the control center and issuing accurate operating instructions to each device, such as common instructions such as turning on, turning off, and standby. Modbus Poll also supports electrical interfaces for a variety of commonly used devices, allowing users to access the general network for operation and management. Huajun Software Park provides download service of Modbus Poll software, download Modbus For other versions of Poll software, please go to Huajun Software Park!

Modbus Poll software functions

★OLE Automation can be easily interfaced with Visual Basic and used similar to ActiveX controls

★Read/write up to 125 registers

★Read/Write up to 2000 inputs/coils

★Test Center menu (organize your own test strings)

★Print and print preview

★Monitor serial data traffic serial data traffic

★Print and print preview

★Monitoring of serial data streams

★Context-sensitive hlp files

★ 10 display formats, such as floating point, double precision, etc.

★Adjustable Address Base (0 or 1)

★Font and color options

★Broadcast function (slave device ID=0)

★Easy-to-control RS-485 converter and RTS switching

Supported Modbus function codes

​ ​ 01: Read coil status

​ ​ 02: Read input status

​ ​ 03: Read the holding register

​ ​ 04: Read input register

​ ​ 05: Forced single coil

​ ​ 06: Preset single register

15: Forced multi-coil

16: Preset multiple registers

22: Bit operation register

23:Read/write register

Modbus Poll software features

​ ​ 1. Standard and open. Users can use this software protocol for free and with confidence. There is no need to pay license fees and it will not infringe on intellectual property rights. Currently, more than 400 manufacturers support this software, and more than 600 products support this program.

2. The software can support a variety of electrical interfaces, such as RS-232, RS-485, etc., and can also transmit on various media, such as twisted pair, optical fiber, wireless, etc.

3. The frame format of this software is simple, compact and easy to understand. Easy for users to use and simple for manufacturers to develop

4. Other features:

Transmission on the software network

​ ​ 1. The standard Modbus port uses an RS-232C compatible serial interface, which defines the pins, cables, signal bits, transmission baud rate, and parity of the connection port. The controller can be networked directly or via Modem

​ ​ 2. Controller communication uses master-slave technology, that is, only one device (master device) can initiate transmission (query). Other devices (slave devices) respond accordingly based on the data provided by the master device query. Typical main devices: host computer and programmable instrument. Typical slave device: programmable controller

​ 3. The master device can communicate with the slave devices individually, or with all slave devices in a broadcast manner. If communicating alone, the slave device returns a message as a response. If the query is broadcast, no response is made. This software protocol establishes the format for master device query: device (or broadcast) address, function code, all data to be sent, an error detection field

​ ​ 4. The slave device response message is also composed of the software protocol, including a field confirming the action to be taken, any data to be returned, and an error detection field. If an error occurs during message reception, or the slave device is unable to execute its command, the slave device will create an error message and send it as a response

Modbus Poll installation steps

​​ 1. Put Modbus into Huajun Software Park Download Poll and extract it to the current folder. Click on the ModbusPollSetup64Bit.exe application to enter the license agreement interface. Click I accept.

​ ​ 2. Select the software installation location interface. Huajun editor recommends that users install it in the D drive, select the installation location and click Next.

3. Modbus Poll installation is completed, click Finish.

Modbus Poll Instructions for Use

​ ​ 1. Data display mode setting

By default, the display mode of register data is Signed mode (hexadecimal unsigned binary), and the data range is -32768-32767. If the user wants to display other numerical values, he can select the setting through the menu "Display".

​ ​ 2.Address format setting

​​ ​Modbus Slave uses PLC address by default. In the "Display" menu, "PLC Addresses(Base 1)" is the default selected state, and the starting address of the default register is 1. This point is related to the serial port and TCP data forwarding of MCGS.

The drivers are the same. If you need to set the starting address to 0 during testing, you can select "Protocol Addresses(Base 0)". Generally, the default PLC address can be used

2. Connection

​​ 1.Click "Connect..F3" in the menu "Connection" to connect

​ 2. Pop up the connection dialog box

in:

★Port1, indicates the serial port (COM1) used, select different serial ports or TCP/IP to connect according to the actual situation

★Mode, indicating the protocol mode, is valid when using the serial port; it is automatically in TCP mode when using TCP/IP

★Respones Timeout, indicating the read timeout. If the slave does not return data within the timeout, the communication is considered to have failed.

★Delay Between Polls, the minimum interval between each scan, the default is 10ms

★Remote Server, indicating the network settings of the terminal slave device in TCP/IP mode.

★IP Address, indicating the slave IP address in TCP/IP mode

★Port, indicating the slave network port in TCP mode

Users can set the parameters as needed. The default is: serial port 1, baud rate 9600, 8 data bits, no parity bit, 1 stop bit. After confirming the settings, click the "OK" button

3. At this time, the main window will display relevant information about reading the register.

in:

★Tx = 4: Indicates the number of times data frames are sent to the master station, 4 times in the picture

★Error = 0: Indicates the number of communication errors, 0 times in the picture

★ID = 1: Indicates the device address of the simulated sub-device, the address in the picture is 1

★F = 03: Indicates the function code used, the picture shows the 03 function code

★SR = 1000ms: Indicates the scan cycle

The red part indicates the current error status, "No Connection" indicates the unconnected status

3. Register value changes

           Double-click the mouse on the register address in the main window, a modification dialog box will pop up, enter the value in the Value input box to confirm, the range is -32768-32767

in:

★Slave: is the address of the Modbus slave station to be accessed, corresponding to the ID value in the main screen, the default is 1

★Address: is the address of the register currently operated. The picture shows the operation of register 30002

★Use Function: For the function code used, you can choose 06 or 16 function code for writing

​ ​ 4. View communication data frames

Click "Communication..." in the "Display" menu to bring up the serial port sending and receiving data frame monitoring information dialog box, which is used to view and analyze the data frames sent and received.

in:

★The first 6 digits are the sequence number of the data frame

★Rx: Indicates receiving data frame

★Tx: Indicates sending data frame

5. Disconnect

Click "Disconnect F4" to disconnect and end the test. At this time, a red "No Connection" appears in the main window to indicate that it is not connected.

Modbus Poll FAQ

      Q: How to uninstall the Modbus Poll software?

Answer: Method 1: Install and open the computer manager software, select the software management option, click the uninstall option, find the Modbus Poll software in the list, and click uninstall.

Method 2: Install and open 360 Software Manager, find the Modbus Poll software in the list of uninstall options, and click to uninstall.

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