3. AIAO Units
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1-171
2. If you do not know how to tune the PID parameters in your control environment, use
“auto-tuning” to generate K
P
, K
I
and K
D
and further modify them into better K
P
, K
I
and K
D
. To
utilize the auto-tuning, set the auto-tuning CR to K1. After the auto-tuning is completed, the
CR will automatically return to K0.
3. To enter K
P
, K
I
and K
D
manually, set K
P
first, then set K
I
and K
D
to “0” to disable the integral
and derivative control functions. When K
P
is set, modify K
I
and K
D
. It is recommend
decreasing K
I
and K
D
downward from 0.
4. If the output percentage fluctuates too much, adjust K
D
. The closer K
D
is to 0, the less
fluctuation there will be in the output percentage. If the curve is too gradual, adjust K
I
. The
closer the K
I
is to 0, the more abrupt the curve becomes.
3.2.5.8 Description of the Special Registers D9900~D9999
When the ELCM controller is connected to special I/O modules, registers D9900~D9999 will be
reserved for storing values from those modules. Use the MOV instruction to read values in
D9900~D9999.
When the ELCM controller is connected to an ELCM-TC04ANNN, the following parameters can
be accessed per the table below:
Module0 Module1 Module2 Module3 Module4 Module5 Module6 Module7
Description
D1320 D1321 D1322 D1323
D1324
D1325
D1326
D1327 Model
code
D9900 D9910 D9920 D9930
D9940
D9950
D9960
D9970
CH1 average
temperature
D9901 D9911 D9921 D9931
D9941
D9951
D9961
D9971
CH2 average
temperature
D9902 D9912 D9922 D9932
D9942
D9952
D9962
D9972
CH3 average
temperature
D9903 D9913 D9923 D9933
D9943
D9953
D9963
D9973
CH4 average
temperature
1.
D9900~D9999 are average input values for CH1 ~ CH4 and the number of samples is
K1~K100. When the number of samples is set to K1, the values in D9900~D9999 are
present values. Use: 1. ELCM_AIO Configuration Wizard in ELCSoft or 2. FROM/TO
instructions (CR#8~CR#11) to set the number of samples to K1
2. Example:
Ladder diagram:
Explanation:
Save CH1 average temperature for
Module#0 to D0
Save CH2 average temperature for
Module#1 to D2
M1000
D9922
D4
D9900
MOV
D9911
MOV
MOV
D0
D2
Save CH3 average temperature for
Module#2 to D4
