Chapter 6 Applied Instructions Symbol EN ： Enable/Disable the instruction PID_RUN ： Enable the PID algorithm SV ： Target value (SV) PV ： Process value (PV) PID_MODE ： PID control mode PID_MAN ： PID Auto/Manual mode MOUT_AUTO ： Manual/Auto output value CYCLE ： Sampling time (CYCLE) Kc_Kp ： Proportional gain Ti_Ki ： Integral coefficient (sec.
or 1/sec) Td_Kd ： Derivative coefficient (sec) Tf ： Derivate-action time constant (sec) PID_EQ ： PID formula types PID_DE ： Calculation of the PID derivative error PID_DIR ： PID forward/reverse direction (PID_DIR) Range within which the error value is ERR_DBW ： counted as 0 6_ MV_MAX ： Maximum output value (MV_MAX) MV_MIN ： Minimum output value (MV_MIN) MOUT ： Manual output value (MOUT) BIES3 ： Feed forward output value I_MV ： Accumulated integral value MV ： Output value (MV) Explanation 1. This instruction implements the PID algorithm. After the sampling time is reached, the instruction applies PID algorithm. PID stands for Proportional, Integral, Derivative.
The PID control is widely applied to mechanical, pneumatic, and electronic equipment. 2. The parameter settings are listed in the following table. 6-199