# Very Concerning Read/Write Issues. Important information for all users **URL:** \ **Category:** Ignition\ **Created:** [June 22, 2018, 5:34pm UTC](https://forum.inductiveautomation.com/t/very-concerning-read-write-issues-important-information-for-all-users/18583 "2018-06-22T17:34:33Z")\ **Posts on this page:** 1\ **Showing post:** 45
**Author:** ![rwoolnough](https://avatars.discourse-cdn.com/v4/letter/r/3e96dc/32.png) [@rwoolnough](https://forum.inductiveautomation.com/u/rwoolnough)\ **Post date:** [July 5, 2018, 7:57am UTC](https://forum.inductiveautomation.com/t/very-concerning-read-write-issues-important-information-for-all-users/18583/45 "2018-07-05T07:57:32Z")
> [@rwoolnough](#): > > I may be covering ground that has already been covered, but I very rarely if ever us momentary push buttons in any SCADA, HMI application. I am no way an expert but have had experience with Allen Bradley RSLogix 500 / 5000, Panelview Plus, Panel Builder, DTAM's (for those old enough to remember), Omron and the NB / ND screens Not sure why that message got sent, but I will continue it now. Basically I have had some experience with Siemens, AB, Omron, Mitsubishi, Red Lion, Citect, Wonderware and others. In the majority of cases, I use a "Latch" Push Button and turn the bit off within the PLC code. The button is only on for 1 scan. This ensures that if 'communication' is lost between the PLC and the HMI / SCADA, the device will not stay on unless the PLC code allows it. I use this method even when jogging motors etc. The bit is turned on from the screen. it stays on for 1 scan and then it it is reset. If the Push Button is still pressed, it will immediately turn back on for another scan. This will depend on the scan direction but the Push Button from the screen turns on Bit1 and resets the Push Button then on the line above the "normally Open" of bit1 unlatches / resets Bit1. Bit1 is on for 1 scan cycle and the button is turned off. I hope I have had a chance to help someone with my method --- _[View the full topic](https://forum.inductiveautomation.com/t/very-concerning-read-write-issues-important-information-for-all-users/18583)._