prtbrown

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About prtbrown

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  • Country Angola

  1. floating point constant

    prtbrown replied to prtbrown's topic in CX-Programmer

    thanks for the replies. this is my first job working with PLCs (but learning quickly!) I am reusing code from another programmer. Under the PIDAT (191) instruction he has set the Setpoint Value as an operator input value (IDEAT1_PID_SV) which is an UINT. In the screenshot of the HMI the example input value is 7.2. For my present spec, I need to fix the setpoint at a value of 0.85. So my confusion is how do I set 0.85 as a constant in the PIDAT instruction? The CPU is a CS1G-H

  2. floating point constant

    prtbrown posted a topic in CX-Programmer

    I need to set the midpoint of a PID function via sensor readings. The min and max are 0.7-1.0 hence I want to set the midpoint at 0.85. I want to use the Mov instruction to move a floating point number constant (0.85) into an UINT variable but I don't know how. Could I just set the midpoint at 85 and scale the sensor readings by x10?