https://forge.codesys.com/forge/talk/Engineering/thread/8ad90b79b4/2020-02-27T13:55:56.889000ZRecent posts to How to load/save trend file on boot / power off?2020-02-27T13:55:56.889000Z2020-02-27T13:55:56.889000Zjosepmariaramshttps://forge.codesys.com/u/josepmariarams/https://forge.codesys.com77ae2b3d015ba339f81a18d7ca32222091714d9e

<div class="markdown_content"><p>You can use fb_init and fb_exit of a funtion block</p></div>

2020-02-27T13:55:56.628000Z2020-02-27T13:55:56.628000Zk2teknikhttps://forge.codesys.com/u/k2teknik/https://forge.codesys.com49cfb4a5d4b34c1d0a4b0b2fcefcd47b3bf7ac61

<div class="markdown_content"><p>I would like to save my trend file so when the PLC boot up I then can load the old trend file, is there any way to do this?<br/> I can give the file a name (I use "/home/pi/tend.txt"), but I have some problems to make a bool variable (that goes true at boot and power off) that I can use to trig the load/save.</p> <p>The help write about some system events called "PrepareStart" and "PrepareStop", but I get no chance to use these as triggers for an event.</p></div>