# Momentary Pushbutton latching ON **URL:** \ **Category:** Ignition\ **Created:** [November 2, 2012, 10:23pm UTC](https://forum.inductiveautomation.com/t/momentary-pushbutton-latching-on/5373 "2012-11-02T22:23:15Z")\ **Posts on this page:** 1\ **Showing post:** 40
**Author:** ![sbrannen](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbrannen/32/3459_2.png) [@sbrannen](https://forum.inductiveautomation.com/u/sbrannen)\ **Post date:** [May 1, 2018, 2:08pm UTC](https://forum.inductiveautomation.com/t/momentary-pushbutton-latching-on/5373/40 "2018-05-01T14:08:47Z")
To whom it may concern… I have experimented with different settings on the Scan Class associated with my Momentary button template. After several failed attempts, I finally copied the Default Scan Class (Direct, 1000ms, Subscribed) and checked the option for ‘OPC Read After Write’. In testing, I have (as yet) been unable to cause the bit to latch after well over a thousand mouse clicks whereas I was able to easily cause a latch after just a few dozen clicks without the OPC Read After Write option selected. Perhaps a workaround, perhaps just a coincidence? If used make sure you are in a test bed and not a live environment. We are using for pre-FAT at the moment, so we will have a much better grasp of the work-ability after another week or so of testing… but, so far, so good. Fingers crossed. Steve --- _[View the full topic](https://forum.inductiveautomation.com/t/momentary-pushbutton-latching-on/5373)._