Changes

==Introduction==

==Summary==

'''Modbus''' is a serial communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). Modbus has become a de facto standard communication protocol and is now a commonly available means of connecting industrial electronic devices. The main reasons for the use of Modbus in the industrial environment are:

'''Modbus''' is a serial communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). Modbus has become a de facto standard communication protocol and is now a commonly available means of connecting industrial electronic devices. The main reasons for the use of Modbus in the industrial environment are:

Modbus enables communication among many devices connected to the same network, for example, a system that measures temperature and humidity and communicates the results to a computer. Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems. Many of the data types are named from its use in driving relays: a single-bit physical output is called a coil, and a single-bit physical input is called a discrete input or a contact.

Modbus enables communication among many devices connected to the same network, for example, a system that measures temperature and humidity and communicates the results to a computer. Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems. Many of the data types are named from its use in driving relays: a single-bit physical output is called a coil, and a single-bit physical input is called a discrete input or a contact.

This article provides an example on how to use Modbus serial to monitor a slave device, send data to server and how to configure slave alarms.

This article provides a brief example on how to use Modbus serial to monitor a slave device, send data to server and how to configure slave alarms. To find more information about this feature visit [[RUT955 Modbus]] and [[RUT955 RS232/RS485]] pages.

==Prerequisites==

==Prerequisites==

*Hercules and modRSsim applications

*Hercules and modRSsim applications

*RS232 to USB cable

*RS232 to USB cable

==Configuring Modbus serial slave device==

==Configuring Modbus serial slave device==

----

----

In order to test the functionality you will need to setup Server (you can run a server on the same computer you use as a slave simulator).

In order to test the functionality, you will need to set up a server (you can run a server on the same computer you use as a slave simulator).

 

 

There are many ways how you can create a server to which Modbus will send data to. In this example we are going to be using Windows 10 computer and Hercules app, which you can download  [https://www.hw-group.com/product-version/hercules here], to create a test server. Download, install the app and apply the configuration below:

There are many ways how you can create a server to which Modbus will send data to. In this example we are going to be using Windows 10 computer and Hercules app, which you can download  [https://www.hw-group.com/product-version/hercules here], to create a test server. Download, install the app and apply the configuration below:

==Slave alarms==

==Slave alarms==

(P.S. in order to perform this test sim card is required) 

In order to setup the following configuration SIM card is required.

Go back to '''Services > Modbus > Modbus Serial Master''' and press edit the same Slave configuration or create a new one. There will be section called '''Slave alarms'''. Create a name, then press '''Add''' button. When it appears like in the example, press '''Edit'''.

Go back to '''Services > Modbus > Modbus Serial Master''' and press edit the same Slave configuration or create a new one. There will be section called '''Slave alarms'''. Create a name, then press '''Add''' button. When it appears like in the example, press '''Edit'''.