Template:Networking rut955 manual modbus serial: Difference between revisions
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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 | This article provides an example on how to use Modbus serial to monitor a slave device and send data to server. | ||
==Prerequisites== | |||
*One RUT955 router | |||
*Windows 10 computer | |||
*Hercules and modRSsim applications | |||
*RS232 to USB cable | |||
==Configuring Modbus serial slave device== | ==Configuring Modbus serial slave device== | ||
In this example we are going to be using our Windows 10 computer as a slave. To do so you will need to download and install '''modRSsim''' application, which you can download [https://sourceforge.net/projects/modrssim/ here]. | |||
Revision as of 17:43, 9 March 2020
Introduction
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:
- developed with industrial applications in mind,
- openly published and royalty-free,
- easy to deploy and maintain,
- moves raw bits or words without placing many restrictions on vendors.
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 and send data to server.
Prerequisites
- One RUT955 router
- Windows 10 computer
- Hercules and modRSsim applications
- RS232 to USB cable
Configuring Modbus serial slave device
In this example we are going to be using our Windows 10 computer as a slave. To do so you will need to download and install modRSsim application, which you can download here.