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Sorry first up for what may seem like a simple post / question, however I am pulling my hair out with reading the programming manual and have had no help from Mitsubishi's PLC technical support team. I have a Mitsubishi Alpha 2 (AL2-10MR-A) that I am using to count the starts of a jacking pump via input one. The intention is to have output one operate when the jacking pump start count reaches 5 within a 24 hour period. When the 24 hour period has expired, the count will reset to zero. The count will also reset to zero when a manual keypad key is pressed. I have been able to figure out the counting and reset via the keypad no bother, however, including the 24 hour clock reset is proving difficult. Has anyone had any experience with adding the 24 clock function at all, and can offer advice or examples? This is being programmed directly via the keypad. TIA
Hi Although I have used programming languages like basic and C for many years, I have recently tried to get to grips with programming (with the software (not direct)) the Alpha2 I have to admit that I am struggling! I have made a little progress since I worked out that you have to build almost everything at a very low level. But I still can not work out how you make variables that can be used in the program? For example : If condition A is true X = 10; But if condition A is false then X = 2. I have tried using the bit inputs on the math FBs to enable/disable values of X, but although this will initially alter the value , sending a 0 bit merely freezes the calculation and the value does not change. It seems like it should be such a simple thing to do? Is there a fundamental concept I am missing? Any help would be greatly appreciated