LSIS Master-K K1000S - Chapter 15 The PID Function of K200 S; Introduction; The PID Function of K200 S

Chapter 15 The PID function of K200S MASTER-K
15-1
15 The PID function of K200S
15.1 Introduction
This chapter provides information about the built-in PID (Proportional Integral Differential)
control function of K200S B and C type CPU module (K3P-07BS and K3P-07CS). The K200S
series does not have separated PID module like K300S and K1000S series, but the PID
function is integrated into the CPU module B and C type.
The PID control means a control action in order to keep the object at a set value (SV). It
compares the SV with a sensor measured value (PV : Present value) and when a difference
between SV and PV (E : the deviation) is detected, the controller output the manipulate value
(MV) to the actuator to eliminate the difference. The PID control consists of three control actions
that are proportional (P), integral (I), and differential (D).
The characteristics of the PID function of K200S is as following;
- the PID function is integrated into the CPU module. Therefore, all PID control action can be
performed with sequence program without any separated PID module.
- forward / reverse operations are available.
- P operation, PI operation, PID operation and On/Off operation can be selected easily.
- the manual output (the user-defined forced output) is available.
- by proper parameter setting, it can keep stable operation regardless of external disturbance.
- the operation scan time (the interval that PID controller gets a sampling data from a ctuator)
is changeable for optimizing the system characteristics.