# Slow refresh rate **URL:** \ **Category:** General Discussion\ **Tags:** ignition79\ **Created:** [August 11, 2021, 9:11pm UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823 "2021-08-11T21:11:55Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![michaelf](https://avatars.discourse-cdn.com/v4/letter/m/ecc23a/32.png) [@michaelf](https://forum.inductiveautomation.com/u/michaelf)\ **Post date:** [August 11, 2021, 9:11pm UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823/1 "2021-08-11T21:11:55Z")
Hi, We have Edge 7.9.10 Ignition project installed on AB Panel Windows 7. The project has been developed over years hence unused tags and unwanted scripts are potential to be there. A few options already tried including: - Extending client memory - Scan classes (Default: 500ms and 100ms) Thoughts? Extra tools to look on might more helpful? Could you help out? Appreciate, Michael Attached screenshots. ![Module Configuration](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/7/77735d8e45548e96a0718a26a9ad9dfa8b12c18b.jpeg) ![Diagnostic](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/b/5b3b88e1d599a067ddbe098f9711de4d20663369.jpeg) ![Execution](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/8/c85add44589e8d9e4d128ceb425af7a44069b7ce.jpeg) ---
**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:** [August 12, 2021, 10:51am UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823/2 "2021-08-12T10:51:19Z")
Look at your driver diagnostics page. I doubt your 100ms scan class is really capable of 100ms. ---
**Author:** ![michaelf](https://avatars.discourse-cdn.com/v4/letter/m/ecc23a/32.png) [@michaelf](https://forum.inductiveautomation.com/u/michaelf)\ **Post date:** [August 14, 2021, 2:23am UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823/3 "2021-08-14T02:23:15Z")
Thanks Phil, had to open port 8088 and re-install ClientVision, the latter also allowed to reconfigure the gateway. Seems normal now. Cheers, Michael ---
**Author:** ![michaelf](https://avatars.discourse-cdn.com/v4/letter/m/ecc23a/32.png) [@michaelf](https://forum.inductiveautomation.com/u/michaelf)\ **Post date:** [November 16, 2021, 10:48pm UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823/4 "2021-11-16T22:48:06Z")
Hi Phil, We have had to set up same project and using same Ignition version on a new machine. It is new setup and we followed same instructions of what we did for the previous one but did not help. It looks this time even slower, about 2 sec delay to refresh. You mentioned that you “doubt your 100ms scan class is really capable of 100ms”. Could you provide me more details in this regards please? Any additional readings I have to check as well? Regards, Michael ---
**Author:** ![Matrix\_Engineering](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/matrix_engineering/32/19781_2.png) [@Matrix\_Engineering](https://forum.inductiveautomation.com/u/Matrix_Engineering)\ **Post date:** [November 16, 2021, 11:19pm UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823/5 "2021-11-16T23:19:00Z")
Assuming you’re still using 7.9.x… Go to the gateway webpage, go to status tab, scroll down on left to Devices (Under Connections header), click Details on the right relevant to the device that you are polling at 100mS. What @pturmel is saying is, it is not impossible to get 100mS scan classes to work on some devices, but on some other devices, it just isn’t possible. I see in your OP that you are using a Logix driver, to achieve 100mS scan classes you may need to use Phil’s driver instead (because his driver utilises Class 1 comms). ---
**Author:** ![michaelf](https://avatars.discourse-cdn.com/v4/letter/m/ecc23a/32.png) [@michaelf](https://forum.inductiveautomation.com/u/michaelf)\ **Post date:** [November 16, 2021, 11:51pm UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823/6 "2021-11-16T23:51:53Z")
Hi, Thanks for your reply. I’ll check again once I have access to the machine. Correct I’m using CompactLogix. Could you explain what’s Phil’s driver? ---
**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 17, 2021, 12:10am UTC](https://forum.inductiveautomation.com/t/slow-refresh-rate/49823/7 "2021-11-17T00:10:18Z")
This is the (my) driver in question: > **[Ignition Third-Party Module Showcase](https://inductiveautomation.com/moduleshowcase/module/automation-professionals-llc-ethernetip-class-1-communications)** > > Easily extend Ignition's core functionality with Third-Party Modules. The Module Showcase is a great place to find a solution that best meets your needs. See also these two older forum posts: > [@Snappy user interfaces with the Ethernet/IP Module](https://forum.inductiveautomation.com/t/snappy-user-interfaces-with-the-ethernet-ip-module/12617): > > Automation Professionals [Ethernet/IP Class1 Communications Module](https://www.automation-pros.com/modulesales.html) has been in beta for a few months with no recent issues. A release to production use is approaching soon and I thought I’d share a test project and its matching PLC code I’ve been using to exercise the module’s base features. In the simplest setup, this driver presents a virtual I/O chassis to to the outside world, populated with up to 100 virtual I/O modules – I/O modules that also appear to be ControlLogix processors with user… > [@Ethernet/IP I/O Module](https://forum.inductiveautomation.com/t/ethernet-ip-i-o-module/12362): > > Automation Professionals is pleased to announce the public beta for its latest module in the showcase: [Ethernet/IP Class 1 Communications](https://inductiveautomation.com/moduleshowcase/module/automation-professionals-llc-ethernetip-class-1-communications):[quote]Provides I/O Scanning and I/O Emulation on top of partial emulation of a Logix processor (Controller Tags and User-Defined data types). Use robust, low latency UDP packets to communicate with Logix processors as one or more I/O modules (passive slave mode), and with a variety of Ethernet/IP I/O modules as an I/O scanner (active master mode). With the Co…