# Modbus TCP connected slave tool can't read tag

**URL:** <https://forum.inductiveautomation.com/t/modbus-tcp-connected-slave-tool-cant-read-tag/86077>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [February 21, 2024, 5:37am UTC](https://forum.inductiveautomation.com/t/modbus-tcp-connected-slave-tool-cant-read-tag/86077 "2024-02-21T05:37:07Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![taohongyu88](https://avatars.discourse-cdn.com/v4/letter/t/f05b48/32.png) [@taohongyu88](https://forum.inductiveautomation.com/u/taohongyu88)\
**Post date:** [February 28, 2024, 6:44am UTC](https://forum.inductiveautomation.com/t/modbus-tcp-connected-slave-tool-cant-read-tag/86077/2 "2024-02-28T06:44:50Z")

</div>

[Modbus TCP tags switch to bad quality - Ignition - Inductive Automation Forum](https://forum.inductiveautomation.com/t/modbus-tcp-tags-switch-to-bad-quality/75834)

It’s probably the address offset, not the DataType. Try turning the “Span Gaps” setting off.

---

_[View the full topic](https://forum.inductiveautomation.com/t/modbus-tcp-connected-slave-tool-cant-read-tag/86077)._