# OPC DA 2.0 Multidimensional Arrays

**URL:** <https://forum.inductiveautomation.com/t/opc-da-2-0-multidimensional-arrays/14856>\
**Category:** Ignition\
**Created:** [July 21, 2017, 3:34pm UTC](https://forum.inductiveautomation.com/t/opc-da-2-0-multidimensional-arrays/14856 "2017-07-21T15:34:08Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![markdobtech](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@markdobtech](https://forum.inductiveautomation.com/u/markdobtech)\
**Post date:** [July 21, 2017, 3:34pm UTC](https://forum.inductiveautomation.com/t/opc-da-2-0-multidimensional-arrays/14856/1 "2017-07-21T15:34:08Z")

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We are using the OPC COM Tunneler to access tags in an OPC DA 2.0 server. One of the tags we need to access is, according the the device vendor, a two dimensional array. It appears the OPC COM Tunneler cannot read this tag. I have done some research and I can’t seem to locate any client that can read OPC DA two dimensional arrays. In most cases, the documentation mentions a limitation on element coercion definition. Can anyone (maybe K Herron?) shed some light on this and/or point in the direction of client that can read a two dimensional array?

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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:** [July 21, 2017, 3:38pm UTC](https://forum.inductiveautomation.com/t/opc-da-2-0-multidimensional-arrays/14856/2 "2017-07-21T15:38:36Z")

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You might try a different tunneler, such as this one: [https://www.unified-automation.com/products/wrapper-and-proxy/uagateway.html](https://www.unified-automation.com/products/wrapper-and-proxy/uagateway.html)

I have very little OPC Classic experience so I’m not sure I can be much more help.

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**Author:** ![nmudge](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nmudge/32/3394_2.png) [@nmudge](https://forum.inductiveautomation.com/u/nmudge)\
**Post date:** [July 21, 2017, 3:57pm UTC](https://forum.inductiveautomation.com/t/opc-da-2-0-multidimensional-arrays/14856/3 "2017-07-21T15:57:00Z")

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If needed, could @Colby.Clegg help or know more?

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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:** [December 3, 2017, 4:20pm UTC](https://forum.inductiveautomation.com/t/opc-da-2-0-multidimensional-arrays/14856/4 "2017-12-03T16:20:39Z")

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Split this topic on December 3, 2017, 4:20pm UTC

A post was split to a new topic: [Modbus Address Map](https://forum.inductiveautomation.com/t/modbus-address-map/16197)