# Modbus

**URL:** <https://forum.inductiveautomation.com/t/modbus/11960>\
**Category:** Ignition\
**Created:** [July 22, 2016, 7:10am UTC](https://forum.inductiveautomation.com/t/modbus/11960 "2016-07-22T07:10:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![BHASKAR](https://avatars.discourse-cdn.com/v4/letter/b/f4b2a3/32.png) [@BHASKAR](https://forum.inductiveautomation.com/u/BHASKAR)\
**Post date:** [July 22, 2016, 7:10am UTC](https://forum.inductiveautomation.com/t/modbus/11960/1 "2016-07-22T07:10:09Z")

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Hi,  
How to interface PLCs with 6 digit modbus addresses in Ignition SCADA?  
I am not able to get the Data in Ignition SCADA with modbus address 40XXXX address. With same PLC, I could able to get the datas in SCADA with ‘Wonderware/Vijeo Citect’ software.

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**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\
**Post date:** [July 22, 2016, 11:54am UTC](https://forum.inductiveautomation.com/t/modbus/11960/2 "2016-07-22T11:54:13Z")

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Hi!

Take a look at [this portion](https://docs.inductiveautomation.com:8443/display/DOC/About+Modbus+Addressing) of the manual.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [July 22, 2016, 3:13pm UTC](https://forum.inductiveautomation.com/t/modbus/11960/3 "2016-07-22T15:13:54Z")

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Usually the 1/2/3/4 prefix is just indicating the area. 4xxxxx is Holding Registers.