Difference between revisions of "Modbus TCP Server Address Table"

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(Created page with "The server address table is used to define the set of Modbus registers that will be visible to other Modbus clients (masters) when the IoTServer is acting as a Modbus server (...")
 
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[[File:Modbus server primary address table page.jpg]]
 
[[File:Modbus server primary address table page.jpg]]
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* Click on the map number or pencil icon to jump to the map editing page for this map.
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* Click on the trash can icon to delete this map.
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* Click the Add Maps button for a special version of the map editing page.
 
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The address table as it will appear for all Secondary Servers is illustrated below. Note that the editing icons and buttons are not available in the secondary address table.
 
The address table as it will appear for all Secondary Servers is illustrated below. Note that the editing icons and buttons are not available in the secondary address table.
  
 
[[File:Modbus server secondary address table page.jpg]]
 
[[File:Modbus server secondary address table page.jpg]]

Revision as of 14:03, 2 May 2019

The server address table is used to define the set of Modbus registers that will be visible to other Modbus clients (masters) when the IoTServer is acting as a Modbus server (slave). The set of Modbus registers that exist in the IoTServer can be defined only once, but you have the option of remapping them to different register numbers that will be accessed by secondary ports on the device. Most often you would use the same register numbers whether they are accessed from Modbus TCP or Modbus RTU, but it is possible to use a completely different set of numbers for each different network port.

The address table can only be defined by the Primary Server. All other instances of Modbus servers or slaves are secondary, and will access the same set of Modbus registers with the option of remapping them to different numbers.


The address table as it will appear for the Primary Server is illustrated below.

Modbus server primary address table page.jpg

  • Click on the map number or pencil icon to jump to the map editing page for this map.
  • Click on the trash can icon to delete this map.
  • Click the Add Maps button for a special version of the map editing page.

The address table as it will appear for all Secondary Servers is illustrated below. Note that the editing icons and buttons are not available in the secondary address table.

Modbus server secondary address table page.jpg