LG Electronics 120S user manual PID8AT, PID Auto Tuning Available device

Chapter 7 Usage of Various Functions

(2) PID8AT

PID8AT

PID Auto Tuning

Available device

No. of

Flag

Instruction

M

P

K

L

F

T

C

S

D

#D

integer

steps

Error

Zero

Carry

(F110)

(F111)

(F112)

n

○

○

5

○

S1

○

Flag set

Error	Error flag turns on when designating area is over
(F110)	and the instruction isn’t executed.

Designation

nRegistration No. at parameter(0~7)

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)

bF bE bD bC bB bA b9 b8 b7 b6 b5 b4 b3 b2 b1 b0

D0000

Auto tuning end bit

Done : normal execution signal

7-32