Hi experts, having issues with this Siemens CPU216 with either hardware or software. When I input value in VW70 via HMI, there is no effect observed ie nothing happens. in fact, sometimes, the whole machine cycle is disrupted at times without any proper explanation. I have to reload the programme to CPU to get to work. Value input in VW 70 value is the last cycle of machine where CV from an encoder is compared with PV and output is given accordingly.
In addition, yesterday when i input value of 500 to move to VW16, the whole machine process got disrupted and the machine now just stops after couple of steps. I then re-input the value of 1800 (which was the original value) but to no effect. I could not observe the values in chart status either. Whats going on? experts please help. Porgramme pdf file attached.
fas pdf (4).pdf