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Hi, I encountered specific problem during work with PLC&HMI application. The main task of that system is controlling torque changes of induction motor with inverter&analog PLC output. There are few built-in functions to change torque: exponential, constant, trapeze and unlucky sine. All functions are implemented as array of 1500 values. When array reaches 1499 element, it comes back on first position and so on. It works without any problem for exp, constant, trapeze and sine wave with natural numbers of frequency e.g. 1Hz, 3Hz etc. The trouble appears when we want to control torque with float value of frequency and unfortunately its the most important part of that project. When the float value frequency is chosen, the last element of array is totally different than the first one. In result, in every period of array, appears drop of value. Check the attachments to comprehend what's going on. The first image shows GXWorks restriction of index. The second image shows how does it look on simulate screen, where it's representation of PLC registers D2000 - D3499. On third and fourth images you see values of registers in Device Memory Batch of GXWorks. Fifth image shows the script which I work on. Do you have any ideas how to implement float values of frequency in correct way? I should make an opportunity to online change of sine frequency in continuous way between 0 and 10 Hz, with 0.2Hz step. I will be very grateful for any advice. Greetings, J
Hi, I encountered a specific problem during work with GXWorks2 & GTDesigner3. In my part of group project I need to receive from proper script, array of values of sine wave. I need to get 1500 values of sine wave and fill registers in GXWorks and have no idea why my script does not run. I'm using simple while loop with no errors statement from Syntax Check. My script should calculate sine values from index 0 to 1500, and substitute it to registers D2000 - D3499. Look in attachments for better understanding my trouble. I'm looking forward to hearing from you as soon as possible. Greetings, Jan P.S. I'm new in Mitsubishi Equipment programming so if it's some kind of beginner's problem - please be merciful for me.