# When Ignition Server lose communication to PLC **URL:** \ **Category:** Ignition Early Access\ **Tags:** vision\ **Created:** [November 18, 2022, 1:35pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682 "2022-11-18T13:35:23Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Simen\_Minerd](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@Simen\_Minerd](https://forum.inductiveautomation.com/u/Simen_Minerd)\ **Post date:** [November 18, 2022, 1:35pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/1 "2022-11-18T13:35:23Z")
When Ignition Server lose communication to PLC, let say the communication module is down. The SCADA Panel Vision Client does not know, it just reading the dead data on the server. I have to use device communication fault to warn operators. Are there is setting to trigger all tags show lose communication when Ignition server is not communicating with PLC? Like when it is not communicating, all SCADA objects would show not usable color. ---
**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:** [November 18, 2022, 1:59pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/2 "2022-11-18T13:59:08Z")
Yes, tag data from OPC has a **quality** assigned to it. When data is no longer being refreshed from the PLC, the quality becomes **stale** , and the objects that are displaying that data get an error overlay (red). That overlay includes an icon for the general reason for the bad quality. (There are several variations.) This is all automatic in Vision, though the overlays can be suppressed on a per-binding basis. ---
**Author:** ![Simen\_Minerd](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@Simen\_Minerd](https://forum.inductiveautomation.com/u/Simen_Minerd)\ **Post date:** [November 18, 2022, 2:38pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/3 "2022-11-18T14:38:26Z")
It is not turning red, that is why I was surprised. The HMI just looks normal, until you try to set (send) a value to the PLC; That is how I found out communication issue between PLC and the server. Vision Client reads dead value on the gateway, it does not bother to check. I have to put a communication indicator on overview screen to show if PLC is connected, using device connection status tag. I have to login to webserver to edit the communication server, not make any change but hit save, the communication module then started to communicate to PLC again. It is so strange. Thank you for reply. ---
**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:** [November 18, 2022, 2:53pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/4 "2022-11-18T14:53:09Z")
What OPC server or driver is this? (Sounds like a broken one.) ---
**Author:** ![Simen\_Minerd](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@Simen\_Minerd](https://forum.inductiveautomation.com/u/Simen_Minerd)\ **Post date:** [November 18, 2022, 4:02pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/5 "2022-11-18T16:02:16Z")
I believe it is default OPC UA; device is CompactLogix ---
**Author:** ![Simen\_Minerd](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@Simen\_Minerd](https://forum.inductiveautomation.com/u/Simen_Minerd)\ **Post date:** [November 18, 2022, 4:05pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/6 "2022-11-18T16:05:30Z")
I actually found lots people have similar issue. The connection went down with no reason. The device connection goes down from time to time. Sometimes it does not reconnect, if you do edit (actually change nothing), then save, it will reconnect. ---
**Author:** ![Simen\_Minerd](https://avatars.discourse-cdn.com/v4/letter/s/e274bd/32.png) [@Simen\_Minerd](https://forum.inductiveautomation.com/u/Simen_Minerd)\ **Post date:** [November 18, 2022, 4:08pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/7 "2022-11-18T16:08:30Z")
I also have sites report all Ignition go down from time to time with no reasons, except old systems talking to PLC5, it did not lose connection. I believe PLC5 sub system use old version of igntion. ---
**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:** [November 18, 2022, 6:16pm UTC](https://forum.inductiveautomation.com/t/when-ignition-server-lose-communication-to-plc/66682/8 "2022-11-18T18:16:26Z")
Consider opening a support ticket and supply all the details to IA.