ADVANTECH Protocol MODBUS-RTUMAP Router App User Guide

Protocol MODBUS-RTUMAP

Advantech Czech s.r.o., Sokolska 71, 562 04 Usti nad Orlici, Czech Republic
Document No. APP-0057-EN, revision from 26th October, 2023.

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Used symbols

Danger -­ Information regarding user safety or potential damage to the router.
    Attention ­- Problems that can arise in specific situations.
   Information ­- Useful tips or information of special interest.
Example ­- Example of function, command or script.

1. Changelog

1.1 Protocol MODBUS-RTUMAP Changelog

v1.0.0 (2012-01-13)

• First release

v1.0.1 (2012-01-20)

• Allowed reading of register zero

v1.0.2 (2013-12-11)

• Added support of FW 4.0.0+

v1.0.3 (2015-08-21)

• Fixed bug in sorting of data in internal buffer

v1.0.4 (2018-09-27)

• Added expected ranges of values to JavaSript error messages

v1.0.5 (2019-02-13)

• Fixed reading of coils

2. Description of router app

Router App Protocol MODBUS-RTUMAP is not contained in the standard router firmware. Uploading of this router app is described in the Configuration manual (see [1, 2]).

The router app is not v4 platform compatible.

Using this module, it is possible to periodically read data from the buffer which stores values obtained from connected measuring devices (meters). To each measuring device can be assigned a certain number of registers (or coils). These ranges follow each other, so RTUMAP module reads data from a total number of assigned registers (or coils) starting from the specified start address. Well-arranged model diagram can be found in the following figure:

Figure 1: Model diagram

1. Computer
2. MODBUS TCP
3. BUFFER
4. METERS

For configuration RTUMAP router app is available web interface, which is invoked by pressing the module name on the Router apps page of the router web interface. The left part of the web interface (ie. menu) contains only the Return item, which switches this web interface to the interface of the router.

3. Configuration of router app

The actual configuration of this router app is performed via the form on the right side. The first item in this form ­- Enable RTUMAP on expansion port -­ is used to activate these router app. Meaning of other items is described in the table below:

events – made to the transmission medium per second)
Data Bits| Number of data bits (7 or 8)
Parity| Parity (none, even or odd)
Stop Bits| Number of stop bits (1 or 2)
Split Timeout| The delay between readings (in milliseconds)
Read Period| Period of reading data from the buffer (in seconds)
TCP Port| TCP port number
Start Address| Start address of register

Table 1: Description of items in configuration form

At the bottom of the configuration form is also available a list of connected meters with information about their settings.

All changes will take effect after pressing the Apply button.

Figure 2: Configuration form

3.1 Adding and removing a measuring device

Individual meters (measuring devices) can be removed from the list by clicking [Delete] item which is situated in front of the meter description. To add meter click on the [Add Meter] item. Before adding a meter, it is neccessary to enter Meter Address, Start Address, number of registers or coils (Number Of Values (Register or Coils)) and select Read Function (see the figure below). This way it is possible to add up to 10 devices.

Figure 3: Adding a measuring device

3.2 Read and write functions

The following figure describes functions that are used for reading and writing between PC, RTUMAP router app and meter. Functions 0x01 (read) and 0x0F (write) are intended only for coils. To be able to write some values to coils on MODBUS RTU device (by function 0x0F), set the read function in a meter declaration to function number 1.

Figure 4: Read and write functions supported by the RTUMAP router app

1. Computer
2. read functions 0x03, 0x04
3. write functions 0x06, 0x10
4. RTUMAP
5. read functions 0x03x 0x04
6. write functions 0x0F (only for coils)
7. MODBUS meter

4. Related Documents

You can obtain product-related documents on Engineering Portal at icr.advantech.cz address.

To get your router’s Quick Start Guide, User Manual, Configuration Manual, or Firmware go to the Router Models page, find the required model, and switch to the Manuals or Firmware tab, respectively.

The Router Apps installation packages and manuals are available on the Router Apps page.

For the Development Documents, go to the DevZone page.

Protocol MODBUS-RTUMAP Manual

References

• Advantech 4G, 5G Cellular Routers & Gateways for IoT applications - Engineering Portal
• Advantech 4G, 5G Cellular Routers & Gateways for IoT applications - Engineering Portal
• DevZone - Cellular Routers Engineering Portal
• Router Apps - Cellular Routers Engineering Portal
• Router Models - Cellular Routers Engineering Portal

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