# How to read data from different databases on TIA Portal using the Modbus Read node on Node Red

**URL:** <https://discourse.nodered.org/t/how-to-read-data-from-different-databases-on-tia-portal-using-the-modbus-read-node-on-node-red/55721>\
**Category:** General\
**Tags:** database, modbus\
**Created:** [26 December 2021 13:19 UTC](https://discourse.nodered.org/t/how-to-read-data-from-different-databases-on-tia-portal-using-the-modbus-read-node-on-node-red/55721 "2021-12-26T13:19:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![diyabijoy](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/diyabijoy/32/52781_2.png) [@diyabijoy](https://discourse.nodered.org/u/diyabijoy)\
**Post date:** [26 December 2021 13:19 UTC](https://discourse.nodered.org/t/how-to-read-data-from-different-databases-on-tia-portal-using-the-modbus-read-node-on-node-red/55721/1 "2021-12-26T13:19:56Z")

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Hello there,

I am new to Node Red and I am trying to read a set of values from two databases in TIA Portal V16, using the Modbus Read node. I am able to read the values only from the first database. The Modbus Read node is not reading values from second database.

I tried changing the Unit ID on the Modbus Read node - it dosen't seem to make any difference. How do I read values from the second database using Modbus Read node? - please help.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [24 February 2022 13:20 UTC](https://discourse.nodered.org/t/how-to-read-data-from-different-databases-on-tia-portal-using-the-modbus-read-node-on-node-red/55721/2 "2022-02-24T13:20:11Z")

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