# Intermittent red overlays **URL:** \ **Category:** Ignition\ **Created:** [July 20, 2011, 6:08pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115 "2011-07-20T18:08:25Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![alex.ferrell](https://avatars.discourse-cdn.com/v4/letter/a/958977/32.png) [@alex.ferrell](https://forum.inductiveautomation.com/u/alex.ferrell)\ **Post date:** [July 20, 2011, 6:08pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/1 "2011-07-20T18:08:25Z")
I am getting intermittent red overlays on my HMI screens. What settings can I adjust to allow more time for data to be polled before the overlays show up? It seems that the communications to my PLC is fine- a continuous ping does not show issues and RSLinx is not reporting any read/write failures. We are using RSLinx as the OPC server for our custom software package, but the Ignition screens are using the internal OPC-UA server. ---
**Author:** ![Travis.Cox](https://avatars.discourse-cdn.com/v4/letter/t/b9bd4f/32.png) [@Travis.Cox](https://forum.inductiveautomation.com/u/Travis.Cox)\ **Post date:** [July 20, 2011, 6:13pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/2 "2011-07-20T18:13:02Z")
Log into the Ignition Gateway Configuration and select OPC-UA \> Settings. There you can adjust the stale threshold that is the multiplier by which the server determines that updates from a driver have become stale. So if your scan class is 1 second you have 2.5 seconds until the tag will become stale if we see no data. You can bump that up to 3 and your overlays will probably go away. ---
**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 20, 2011, 6:45pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/3 "2011-07-20T18:45:26Z")
I noticed in another thread you set your “Concurrent Requests” property to 1 on your drivers. This is likely a move in the wrong direction. I would recommend using at least 2, and maybe more on devices which have a high number of tags subscribed (thousands, perhaps). ---
**Author:** ![Travis.Cox](https://avatars.discourse-cdn.com/v4/letter/t/b9bd4f/32.png) [@Travis.Cox](https://forum.inductiveautomation.com/u/Travis.Cox)\ **Post date:** [July 20, 2011, 6:47pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/4 "2011-07-20T18:47:12Z")
Good point. It could be that you are jamming to many requests into one causing stale overlays. ---
**Author:** ![alex.ferrell](https://avatars.discourse-cdn.com/v4/letter/a/958977/32.png) [@alex.ferrell](https://forum.inductiveautomation.com/u/alex.ferrell)\ **Post date:** [July 20, 2011, 9:42pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/5 "2011-07-20T21:42:53Z")
I have my stale threshold set to 20, and my typical sampling rate is 250ms, so that should give me 5 seconds. There is no way I’m getting delays longer than that. I tried raising the concurrent requests to 2 and it is still happening. I really don’t have that many tags set up (150, most of them BOOL or DINT, and some STRING). ---
**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 20, 2011, 9:55pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/6 "2011-07-20T21:55:14Z")
[quote=“alex.ferrell”]I have my stale threshold set to 20, and my typical sampling rate is 250ms, so that should give me 5 seconds. There is no way I’m getting delays longer than that. I tried raising the concurrent requests to 2 and it is still happening. I really don’t have that many tags set up (150, most of them BOOL or DINT, and some STRING).[/quote] Pick a device that’s giving you trouble and go to the [diagnostics] link next to it when you’re looking at the device list in the gateway. Can you screenshot that and show us? ---
**Author:** ![alex.ferrell](https://avatars.discourse-cdn.com/v4/letter/a/958977/32.png) [@alex.ferrell](https://forum.inductiveautomation.com/u/alex.ferrell)\ **Post date:** [July 20, 2011, 10:09pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/7 "2011-07-20T22:09:03Z")
Diagnostics Request Schedule SubscriptionItem Count 150 ScheduledRequest Count 3 Refresh Request Cycle Request Throughput 13.0/sec Min Request Duration 0.0ms Max Request Duration 2485.0ms Avg Request Duration 6.2ms Last Request Duration 0.0ms Refresh @250ms Request Count 3 Request Throughput 11.7/sec Min Request Duration 0.0ms Max Request Duration 2485.0ms Avg Request Duration 6.2ms Last Request Duration 0.0ms Avg Wire Time 6.2ms Avg Queue Time 0.0ms Refresh ---
**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 20, 2011, 10:25pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/8 "2011-07-20T22:25:16Z")
Well, everything on that device looks OK. I see at one point there was a ~2400ms delay, but that wouldn’t have caused a stale quality with the multiplier at 20. Maybe you can call into support and let them poke around a bit. Or maybe that particular device just hasn’t seen a delay that causes stale quality yet. ---
**Author:** ![alex.ferrell](https://avatars.discourse-cdn.com/v4/letter/a/958977/32.png) [@alex.ferrell](https://forum.inductiveautomation.com/u/alex.ferrell)\ **Post date:** [July 20, 2011, 11:02pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/9 "2011-07-20T23:02:21Z")
I might have to call in. That is the only device that I have- all my tags point to that device. Is a stale state the only thing that can cause the red overlay? ---
**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 20, 2011, 11:06pm UTC](https://forum.inductiveautomation.com/t/intermittent-red-overlays/3115/10 "2011-07-20T23:06:58Z")
No, anything other than good quality will cause an overlay of some kind. Maybe we’re looking in the wrong spot. Call in whenever it’s convenient.