Chapter 6 Usage of Various Functions
6-19
(2) PID8AT
Available device
Flag
Instruction
M
P
K
L
F
T
C
S
D
#
D
inte
ger
No. of
Steps
Error
(F110)
Zero
(F111)
Carry
(F112)
n
O
O
PID8AT
S1
O
5 O
■
PID8AT (Auto-tuning by parameter)
a) Usage
•
When the condition of execution is on, PID auto tuning operation executes and calculates
P,I,D constant.
•
‘n’ is registration No.at parameter( 0 ~ 7)
•
S1 is execution status and P,I,D constant registration area.
b) Example program
•
When the input condition M0 turns on, PID operation executes at no.2 parameter.
•
PID execution status stores D0000 and the output value of control result stores D0001
and P,I,D constant sequentially store D002(P),D003(I),D004(D).
PID8AT n S
1
Flag Set
Error
(F110)
Error flag turns on when designating
area is over and the instruction isn’t
executed.
Designation
n
Registration No. at parameter(0~7)
S
1
Execution status registration area
Done : normal execution signal
D0000
Auto tuning end bit
b0
b6
b7
bF bE bD bC bB bA b9 b8
b1
b2
b5 b4 b3
