Chapter 15. The PID functions
15-19
15.3.3 Auto tuning function block (PID6AT)
Function block
Description
Input
EN : enable input of function block
SV : set value (goal value) data input
(range : 0 ~ 4000)
PV : present value input
(range : 0 ~ 4000)
S_TIME : scan time input (sampling interval)
(range : 0 ~ 100)
RIPPLE : select the wave form to be used for auto
tuning operation. Select 1 in general case.
Output
DONE : Turn on whenever the auto tuning operation
is completed.
END : Turns on when the F/B operation is
completed with no error, and keep the status
until next F/B execution
STAT : shows the error code
MV : the manipulated value of current loop on which
the auto tuning operation is performed.
(range : 0 ~ 4000)
P : the proportional gain constant obtained by auto
tuning operation. (range : 0.01 ~ 100.00)
I : the integral time constant obtained by auto tuning
operation.
D : the derivative time constant obtained by auto
tuning operation
AT
EN
SP
PV
DONE
MV
BOOL
BOOL
INT
STAT
USINT
S_TIME
INT
P
UINT
I
D
PID6AT
INT
UINT
UINT
UINT
RIPPLE
INT
END
BOOL