# Modbus TCP Connected Device Works with Modpoll but NOT on Ignition!

**URL:** <https://forum.inductiveautomation.com/t/modbus-tcp-connected-device-works-with-modpoll-but-not-on-ignition/55916>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [February 9, 2022, 3:22pm UTC](https://forum.inductiveautomation.com/t/modbus-tcp-connected-device-works-with-modpoll-but-not-on-ignition/55916 "2022-02-09T15:22:49Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![John\_Reilly](https://avatars.discourse-cdn.com/v4/letter/j/85e7bf/32.png) [@John\_Reilly](https://forum.inductiveautomation.com/u/John_Reilly)\
**Post date:** [February 9, 2022, 3:26pm UTC](https://forum.inductiveautomation.com/t/modbus-tcp-connected-device-works-with-modpoll-but-not-on-ignition/55916/3 "2022-02-09T15:26:08Z")

</div>

Even tried this forum post [Modbus read two register into one opc tag](https://forum.inductiveautomation.com/t/modbus-read-two-register-into-one-opc-tag/41858)

 ![Modbus Tags Path - Using dervied tag](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/7/e77cf15a2c3dfb7bb4035aedb2f1786dd1c5f36f.png)

---

_[View the full topic](https://forum.inductiveautomation.com/t/modbus-tcp-connected-device-works-with-modpoll-but-not-on-ignition/55916)._