# New CIP Connection Size parameter with plc upgrade

**URL:** <https://forum.inductiveautomation.com/t/new-cip-connection-size-parameter-with-plc-upgrade/42784>\
**Category:** Ignition\
**Created:** [January 30, 2021, 3:11pm UTC](https://forum.inductiveautomation.com/t/new-cip-connection-size-parameter-with-plc-upgrade/42784 "2021-01-30T15:11:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Dan\_Bridgeman](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dan_bridgeman/32/3610_2.png) [@Dan\_Bridgeman](https://forum.inductiveautomation.com/u/Dan_Bridgeman)\
**Post date:** [January 30, 2021, 3:11pm UTC](https://forum.inductiveautomation.com/t/new-cip-connection-size-parameter-with-plc-upgrade/42784/1 "2021-01-30T15:11:36Z")

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I’m setting up new OPC Device Connections for Allen-Bradley PLCs which are being updated to v32 firmware. This requires using the new Allen-Bradley Logix driver, and it has a CIP Connection Size parameter which the Legacy ControlLogix driver did not include (or maybe defaulted to something without the option to change it).

The default value is 500, and not being familiar with this protocol, I’m not sure if I need to change it. Has anyone made a similar upgrade and needed to tweak this setting?

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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:** [January 30, 2021, 4:08pm UTC](https://forum.inductiveautomation.com/t/new-cip-connection-size-parameter-with-plc-upgrade/42784/2 "2021-01-30T16:08:14Z")

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On modern Logix, you can set it to 4000 for a nice bump in throughput. As long as all AB components in the connection path support it. It’ll be pretty obvious if there’s a weak link.