# Connecting a Modbus TCP Device in Trial Mode

**URL:** <https://forum.inductiveautomation.com/t/connecting-a-modbus-tcp-device-in-trial-mode/75341>\
**Category:** Ignition\
**Created:** [June 21, 2023, 2:07pm UTC](https://forum.inductiveautomation.com/t/connecting-a-modbus-tcp-device-in-trial-mode/75341 "2023-06-21T14:07:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Gavin\_Bentley](https://avatars.discourse-cdn.com/v4/letter/g/8c91f0/32.png) [@Gavin\_Bentley](https://forum.inductiveautomation.com/u/Gavin_Bentley)\
**Post date:** [June 21, 2023, 2:07pm UTC](https://forum.inductiveautomation.com/t/connecting-a-modbus-tcp-device-in-trial-mode/75341/1 "2023-06-21T14:07:32Z")

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Do i have to have a full license to test if i can connect a Modbus TCP device. I can read the device with Modscan from my laptop but Ignition wont connect using the same parameters.

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [June 21, 2023, 2:10pm UTC](https://forum.inductiveautomation.com/t/connecting-a-modbus-tcp-device-in-trial-mode/75341/2 "2023-06-21T14:10:48Z")

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No, Ignition's drivers are fully functional in trial mode.

Share what is happening in ModScan versus what you've set up in Ignition.

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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:** [June 21, 2023, 2:11pm UTC](https://forum.inductiveautomation.com/t/connecting-a-modbus-tcp-device-in-trial-mode/75341/3 "2023-06-21T14:11:12Z")

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No, trial should work. Post some more details.

Modscan uses unit/slave id 1 by default. Ignition uses 0 by default. Check that first.

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**Author:** ![Gavin\_Bentley](https://avatars.discourse-cdn.com/v4/letter/g/8c91f0/32.png) [@Gavin\_Bentley](https://forum.inductiveautomation.com/u/Gavin_Bentley)\
**Post date:** [June 21, 2023, 2:15pm UTC](https://forum.inductiveautomation.com/t/connecting-a-modbus-tcp-device-in-trial-mode/75341/4 "2023-06-21T14:15:26Z")

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That was it thanks for helping. I had default address as 1 not 0. Both items are now connected.