Multi segment curve temperature control FB (SCL program) of PLC function block series

We should be very clear about multi-stage temperature control , Many ovens require temperature rise curves for process reasons . Many control instruments in the market are also integrated with multi segment curve temperature control , The control curve of the temperature control meter shall be set according to the multi segment curve ,( A lot of support MODBUS Communications , Just set the parameters for direct communication ). The setting of temperature control meter is not the focus of this discussion . This article mainly describes botu PLC Generating function of temperature control curve . The essence of the temperature control curve is a linear function of one degree and many segments , For those who are not clear about linear functions, please refer to the following blog post , Due to the limited level and ability, mistakes are inevitable in the text , Welcome to correct . At the same time, I would like to thank you for your praise and forwarding .

PLC Analog acquisition linear function (y=kx+b)_RXXW_Dor The blog of -CSDN Blog How to design analog acquisition Library , For the specific algorithm code, please refer to another blog post ：PLC Analog input Analog quantity conversion FC：S_ITR_RXXW_BOSS The blog of -CSDN Blog _s_itr Analog acquisition 、 It is widely used in industrial field 、 The measured value and output signal of most sensors are linear , So we can use linear function to directly convert , Not much to say , Direct drawing and code S_ITRScale Integer to RealThe formula is as follows:Ov = [(OSH - OSL) * (Iv - ISL) / (ISH - ISL)] + OSLwit.....https://blog.csdn.net