https://forge.codesys.com/forge/talk/Engineering/thread/a9f08c2a5c/2020-06-03T06:03:04.539000ZRecent posts to Detect Online change / Download2020-06-03T06:03:04.539000Z2020-06-03T06:03:04.539000ZTonhttps://forge.codesys.com/u/ton/https://forge.codesys.come5ed0206ebd04017a203b99a4ac42f83722db9bb

<div class="markdown_content"><p>Maybe you can use System Events.</p> <p><a href="https://help.codesys.com/webapp/_cds_obj_task_config_sys_event;product=codesys;version=3.5.15.0" rel="nofollow">https://help.codesys.com/webapp/_cds_obj_task_config_sys_event;product=codesys;version=3.5.15.0</a></p></div>

2020-06-02T14:29:03.433000Z2020-06-02T14:29:03.433000Zaliazzzhttps://forge.codesys.com/u/aliazzz/https://forge.codesys.come39cb4a2485553f9d30484b4556631804e3b158e

<div class="markdown_content"><p>Thanks for the feedback. However, I don't have a solution for you at this time. Maybe someone else has a better solution for this? Then I am all ears for too.</p></div>

2020-06-02T14:16:49.709000Z2020-06-02T14:16:49.709000Zhence.perssonhttps://forge.codesys.com/u/hence-persson/https://forge.codesys.comd1c3112be6b364ce843cf8f657b374be5770ee97

<div class="markdown_content"><p>Tested not what I want.. I want something regardless where the program has changed the method FB_Exit seems to work as intended but only if I have changed in that particular FB.</p></div>

2020-06-02T09:12:53.354000Z2020-06-02T09:12:53.354000Zhence.perssonhttps://forge.codesys.com/u/hence-persson/https://forge.codesys.comc5a77e838dea4ea9ac376ad4080a9606459e084f

<div class="markdown_content"><p>But I want the bit to be set and sent over to another system BEFORE download/online change not after as would be the case with FB_Init?</p> <p>But you may have pointed me in a good direction.. What about FB_Exit.. As I understand it this will be called before downloading/online change.</p></div>

2020-06-02T08:39:34.804000Z2020-06-02T08:39:34.804000Zaliazzzhttps://forge.codesys.com/u/aliazzz/https://forge.codesys.comff2bd6604688757fb166c640b39724fd2163abbe

<div class="markdown_content"><p>Consider usage of FB_Init<br/> See CODESYS help for more information on this initialisation mechanism</p></div>

2020-06-02T08:13:25.634000Z2020-06-02T08:13:25.634000Zhence.perssonhttps://forge.codesys.com/u/hence-persson/https://forge.codesys.combd78f0daa818b0fe0d932f116ad3edc9a21f75cf

<div class="markdown_content"><p>I would like my code to set a bit before an eventual download (Both online change and download).<br/> Then I would like enough time to send this bit out via RS485 before eventual download/online change..<br/> I have the RS485 communication going in a task sending reciving much data.The only thing I want is to set a bit and send this out BEFORE the online change / download.</p> <p>Is this possible? I see there are suitable event handlers in the task management (Prepare online change, Prepare Download) but when I register these events will the normal program run? And if so for how long? (I would not like putting any RS485 code in the called event just set a bit in the called event. The RS485 code is in another part of the program building complete telegrams and sending them.</p></div>