isaacchandler99
Member
On a system consisting of several VFDs and servos, I have one VFD that approximately once every couple hours gives me a fail to start. This is a fail to start alarm that I create if the VFD is receiving the start command and not running, it is a fail to start. I believe that because it only will start on a rising edge and maybe the start and stop happen so quickly that the code will start and then stop so quickly that it doesn't catch the rising edge of the start and never starts, but the alarm I created sees the start command and no run status and alarms. I copy all of my inputs such as photoeyes and reed switches to a buffer to make sure the I/O is synchronous to the code and have a slight delay on/off for each of them. I attached an image of the logic. Any ideas? Thanks guys!