# Connected Protocol: PCC

**URL:** <https://forum.inductiveautomation.com/t/connected-protocol-pcc/17982>\
**Category:** Ignition\
**Tags:** ignition79\
**Created:** [May 10, 2018, 1:03am UTC](https://forum.inductiveautomation.com/t/connected-protocol-pcc/17982 "2018-05-10T01:03:23Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![trishhiyah](https://avatars.discourse-cdn.com/v4/letter/t/9fc29f/32.png) [@trishhiyah](https://forum.inductiveautomation.com/u/trishhiyah)\
**Post date:** [May 10, 2018, 1:03am UTC](https://forum.inductiveautomation.com/t/connected-protocol-pcc/17982/1 "2018-05-10T01:03:23Z")

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Hi I’m seeing device with Status Connected Protocol: PCC. Do anyone have an idea what does this mean? or the root cause of this?

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/5/51d03a4b1536d99f8f779c7be0b2d9b5c315b766.png)

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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:** [May 10, 2018, 1:18am UTC](https://forum.inductiveautomation.com/t/connected-protocol-pcc/17982/2 "2018-05-10T01:18:39Z")

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It generally means it couldn’t connect via Ethernet/IP and is trying to fall back on the legacy protocol. Usually means there’s a network problem between the gateway and device. Presumably could also be due to very old firmware. Has it ever connected?

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<div class="post-metadata">

**Author:** ![trishhiyah](https://avatars.discourse-cdn.com/v4/letter/t/9fc29f/32.png) [@trishhiyah](https://forum.inductiveautomation.com/u/trishhiyah)\
**Post date:** [May 10, 2018, 1:48am UTC](https://forum.inductiveautomation.com/t/connected-protocol-pcc/17982/3 "2018-05-10T01:48:32Z")

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It connect when I edit the device

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/b/b9ed5de23c8062c17e3963f3fe366584a2216b2d.png)  
and save changes without changes  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/2/2f7b67f212c7e07882289f009018f96cfe4e3552.png)  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/d/d020d9eb537d93bef4126c0a0dc7366259fd7bda.png)

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<div class="post-metadata">

**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:** [May 10, 2018, 11:26am UTC](https://forum.inductiveautomation.com/t/connected-protocol-pcc/17982/4 "2018-05-10T11:26:19Z")

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Consider using a firewall to block TCP port 2222 (the legacy protocol port) between your gateway and the device.

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<div class="post-metadata">

**Author:** ![trishhiyah](https://avatars.discourse-cdn.com/v4/letter/t/9fc29f/32.png) [@trishhiyah](https://forum.inductiveautomation.com/u/trishhiyah)\
**Post date:** [May 11, 2018, 1:24am UTC](https://forum.inductiveautomation.com/t/connected-protocol-pcc/17982/5 "2018-05-11T01:24:17Z")

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Yes done with that already, but still experiencing PCC. Kindly check if I miss something. Thanks

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/e/e90d1540ac1a8da307d27d3ab30bf597165ff387.png)