Chapter 6 Applied Instructions 6-185 Device Function Setting range Description Device number number to 0 when the independent formula is used, the proportional control is not used. Ti Ki _ REAL Integral gain (Ti or Ki) (The selection of Ti or Ki depends on the setting of the parameter PID EQ.) _ Range of positive single precision floating-point values (Unit: Ti=Second; Ki=1/second) It is an integral gain. If an integral gain is less than 0, Ti Ki will be count _ as 0. If Ti Ki is _ equal to 0, the integral control is not used.
Td Kd _ REAL Derivative gain (Td or Kd) (The selection of Td or Kd depends on the setting of the parameter PID EQ.) _ Range of positive single precision floating-point values (Unit: Second) It is a derivative gain. If a derivative gain is less than 0, Td Kd will be _ count as 0. If Td Kd is equal to _ 0, the derivative control is not used. Tf REAL Derivative action time constant (Tf) Range of positive single precision floating-point values (Unit: Second) It the derivative action time constant. If the derivative action time constant is less than 0, Tf will be count as 0. If Tf is equal to 0, the derivative action time control is not used.
(Derivative smoothing) PID EQ _ BOOL Selection of a PID formula TRUE：Dependent Formula FALSE：Independent Formula PID DE _ BOOL Selection of the calculation of the PID derivative error True: Using the variations in the PV to calculate the control value of the derivative (Derivative of the PV) False: Using the variations in the error (E) to calculate the control value of the derivative (Derivative of the error) PID DIR _ BOOL PID forward/reverse direction True: Reverse action (E=SV-PV) False: Forward action (E=PV-SV) ERR DBW _ REAL Range within which the error value is counted as 0 Range of single-precision floating-point numbers An error (E) is equal to SV−PV or PV-SV.
If the setting value is 0, the function will not be enabled, otherwise the CPU module will check whether the present error is