# Mitsubishi Driver Device Range Limit

**URL:** <https://forum.inductiveautomation.com/t/mitsubishi-driver-device-range-limit/103447>\
**Category:** Ignition\
**Created:** [March 10, 2025, 12:29pm UTC](https://forum.inductiveautomation.com/t/mitsubishi-driver-device-range-limit/103447 "2025-03-10T12:29:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Eric\_Ervin](https://avatars.discourse-cdn.com/v4/letter/e/ecd19e/32.png) [@Eric\_Ervin](https://forum.inductiveautomation.com/u/Eric_Ervin)\
**Post date:** [March 10, 2025, 12:29pm UTC](https://forum.inductiveautomation.com/t/mitsubishi-driver-device-range-limit/103447/1 "2025-03-10T12:29:39Z")

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I am using the mitsubishi driver to pull data from an R series plc that communicates with the rest of the older plcs in the plant. The issue now is, the r series is setup to use M0 to M400,000.

I can see this in Gx works 3. If i try to read anything past M65535 in Ignition I get an error configuration response back.

What settings would i need to change to read these higher M values?

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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:** [March 10, 2025, 12:35pm UTC](https://forum.inductiveautomation.com/t/mitsubishi-driver-device-range-limit/103447/2 "2025-03-10T12:35:37Z")

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I'm not sure you can. IIRC, this is a MELSEC protocol limitation. Do you have other external devices that can read those higher addresses? If so, a wireshark capture of that would be valuable.

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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:** [March 10, 2025, 12:58pm UTC](https://forum.inductiveautomation.com/t/mitsubishi-driver-device-range-limit/103447/3 "2025-03-10T12:58:23Z")

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Upgrade to Ignition 8.1.47, it made a change to the Mitsubishi driver that allows addressing beyond 0xFFFF.

> Allow addressing offsets beyond `0xFFFF` (65535).

(not sure why the release note doesn't mention the driver...)