Chapter 7 Usage of Various Functions
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1. Refer the KGLWIN manual for the parameter setting.
(1) Parameter setting and explanation
a) PID8 instruction parameter setting and explanation.
(a) Scan time
scan time is the period of reading data (sampling), and also 10 times scaled up. Generally, it should be
synchronized with external trigger input (EN input of function block) to perform proper PID operation. The range of
sampling time is 0.1 ~ 10 seconds, and actual input range is 0 ~ 100.
(b) Manual operate value
When manual operation is designates , manual operation value designates.(input range : 0 ~ 4000)
(c) High frequency noise removal ratio
high frequency noise removal ratio 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 value as higher value.
Otherwise, leave the 1. The range of parameter is 0 ~ 10 and it is not scaled up, so input the designated value
directly.(it is possible that parameter value designates ‘ D’ area also)
Be careful. if designating ‘ D’ area value and designating value directly over 10 , system operate abnormally.
(d) Tracking time constant
TT (tracking time constant) parameter is used to designate anti_reset windup operation. The range of TT is 0.01 ~
10 and the actual input range that are 100 times scaled up is 0 ~ 1000
(e) Reference value
Reference value may be useful parameter according to the control system type, especially velocity, pressure, or
flux control system. The Reference value input is also 10 times scaled up, and the actual range is 0 ~ 10.
(f) Differential time and integral time
I_TIME and D_TIME are 10 times scaled up. For example, input 18894 if the designated I_TIME value is 1889.4.
The range of actual input is 0 ~ 20000.
(it is possible that parameter value designates ‘ D’ area also)
Remarks
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