# Mitsubishi IQ-R communication latency

**URL:** <https://forum.inductiveautomation.com/t/mitsubishi-iq-r-communication-latency/107218>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [June 10, 2025, 8:24am UTC](https://forum.inductiveautomation.com/t/mitsubishi-iq-r-communication-latency/107218 "2025-06-10T08:24:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jiangyao\_Huang](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@Jiangyao\_Huang](https://forum.inductiveautomation.com/u/Jiangyao_Huang)\
**Post date:** [June 10, 2025, 8:24am UTC](https://forum.inductiveautomation.com/t/mitsubishi-iq-r-communication-latency/107218/1 "2025-06-10T08:24:57Z")

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Hello, when testing the Mitsubishi IQ-R driver, I found that the read and write speeds are very slow, especially the write speed. Do you have similar experiences or optimization methods?

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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 10, 2025, 12:38pm UTC](https://forum.inductiveautomation.com/t/mitsubishi-iq-r-communication-latency/107218/2 "2025-06-10T12:38:14Z")

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You need to put some numbers on "very slow", as that means different things for different applications. What is your poll rate? Number of data points? Number of writes per second?

(Perhaps show a screenshot of that device's diagnostics page.)