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Chapter 7 Usage of Various Functions
7-32
(2) PID8AT
Available device
Flag
Instruction
M P K L F T C S D
#
D
integer
No. of
steps
Error
(F110)
Zero
(F111)
Carry
(F112)
n
○
○
S1
○
5
○
n
Registration No. at parameter(0~7)
Error
(F110)
Error flag turns on when designating area is over
and the instruction isn’t executed.
S1
Execution status registration area
■
PID8AT n S1
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)
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
PID8AT
PID Auto Tuning
Designation
Flag set