Akpisgud

Thank you Clear.Mind I really appreciate your concern. Am actually using the MELSOFT GX Developer but am going try this out in the  GX IEC Developer which  I think will be compactable with this. Thanks 

Thank you Clear.Mind for you concern am really very grateful. Please, I read a post by Swimmy67 posted on Jan 18, 2006, is all about PID control with the FX3U Mitsubishi. http://forums.mrplc.com/index.php?/topic/6603-fx3u-pid-autotune-parameters/ Is the code (pdf) still available online? I can't download the program. thanks.   swimmy67

Hi Kraykov & Clear.Mind, Thank you for the replies am really very grateful. The information given really helped me I have been able to create the ladder logic which seem to be working when simulated using the GT Designer 3.  There are other challenges which am still trying to figure out and I still need your help. Am using the FX3u-32MT/DSS PLC with the following modules attached: FX3u-ENET-ADP FX3u-3A-ADP FX3u-IPG. Now am required to create a 3 terms PID controller to control the temperature of a heater. I want to use a temperature sensor(thermocouple) to read the temperature values to the PLC.  In the FX Series manual am using I have not see any example yet and am working to meet a dead line. Please can you advice me on how to use the temperature sensor to get my temperature readings  to PLC and go about the PID stuff. Thank you guys for your time am really grateful.

Hi Guys, Please can any one help on this: am trying to create a PLC ladder logic program for temperature control between a max and min set points. am using Mitsubishi FX CPU series. am finding it difficult to use the function blocks and comparators to create  my set points.though am a bit new to this PLC stuff. Please if any one can help on this that will be appreciated.