Changes

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 a guide on how to use Modbus TCP to monitor {{{name}}} routers with a PC using a Linux Operating System. However, the same principles apply to RUTXxx family routers, but the holding register information will differ. You can find this information in the links below:

This article provides a guide on how to use Modbus TCP to monitor {{{name}}} routers with a PC using a Linux Operating System. However, the same principles apply to RUTXxx and TRBxxfamily routers, but the holding register information will differ. You can find this information in the links below:

*'''[[RUTXR1 Monitoring via Modbus]]'''

*'''[[RUTXR1 Monitoring via Modbus]]'''

*'''[[RUTX12 Monitoring via Modbus]]'''

*'''[[RUTX12 Monitoring via Modbus]]'''

===modbus read===

===Modbus read===

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To obtain parameters from the system, the '''modbus read''' command is used. The syntax for this command is:

To obtain parameters from the system, the '''modbus read''' command is used. The syntax for this command is:

[[File:Configuration examples modbus ip reconstruction.png]]

[[File:Configuration examples modbus ip reconstruction.png]]

 

===Signal strength===

===Signal strength===

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The value we got is '''0000 0000 0011 1011'''. When converted to decimal it becomes '''59''', so the final value is '''- 59'''

The value we got is '''0000 0000 0011 1011'''. When converted to decimal it becomes '''59''', so the final value is '''- 59'''

 

===Text===

===Text===

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==Setting router values==

==Setting router values==

The Modbus daemon also supports the setting of some system parameters. To accomplish this task the '''modbus write''' command is used. System related parameters and how to use them are described below. The register address specifies from which register to start writing the required values. All commands, except “Change APN”, accepts only one input parameter (more on changing APN can be found below).   

The Modbus daemon also supports the setting of some system parameters. To accomplish this task the '''modbus write''' command is used. System related parameters and how to use them are described below. The register address specifies from which register to start writing the required values. All commands, except “Change APN”, accepts only one input parameter {{#ifeq:{{{mobile}}}|1|(more on changing APN can be found below)}}.   

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