Chapter 15 The PID function of K200S MASTER-K
15-17
2) MVMAN
In this area, the data that are output when the manual operation is enabled. When the
MAN is set as 1, the PIDCAL instruction output the MVMAN to MV regardless the PID
operation result. The setting range is 0 ~ 4000.
3) MV_MIN / MV_MAX
User can set limit point on the manipulation value as MV_MIN(the minimum value) and
MV_MAX(the maximum value).
4) N (high frequency noise depression ratio)
This parameter is used for derivative control operation, and shows the ratio of high
frequency noise depression. If there is a lot of high frequency noise in the control system,
select the N value as higher value. Otherwise, leave the N parameter as 1. The range of
N is 0 ~ 10 and it is not scaled up, so input the designated value directly.
5) TT (Tracking time constant)
This parameter is used to cancel anti -windup operation. The range of TT is 0.01 ~ 10 and
the actual input range that are 100 times scaled up is 0 ~ 1000.
6) REF (Reference value)
The REF may be useful parameter according to the control system type, especially
velocity, pressure, or flux control system. The range of REF input is 0.1 ~ 1, but it is 10
times scaled up when input REF into the PLC device (the actual range is 0 ~ 10).
7) D_TIME (Derivation time constant) / I_TIME (Integral time constant)
The range of D_TIME and I_TIME is 0.0 ~ 2000.0. However, the 10 times scaled up value
is used when input data into the PLC device. Therefore, the actual data range is 0 ~
20000.
8) P_GAIN (Proportional gain constant)
The range of P_GAIN is 0.00 ~ 100.00. Because the K200S CPU can not handle floating
point number, it should be scaled up 100 times when input P_GAIN into PLC device.
Therefore, the actual data range of P_GAIN is 0 ~ 10000.
9) EN_D / EN_I / EN_P (Control mode)
The built-in PID controller of K200S has four control modes as following table. The control
mode can be set by EN_D, EN_I, and EN_P words.
No EN_P EN_I EN_D Control mode
1 1 0 0 P operation
2 1 1 0 PI operation
3 1 1 1 PID operation
4 0 0 0 On/off operation
0 : Disable 1 : Enable
To Next Page
Loading...
