Delta AH500 Programming Manual page 352

AH 5 00 Pr ogr am m ing Ma n ua l
Device
Function
number
Ti_Ki
REAL
Td_Kd REAL
Tf REAL
PID_EQ BOOL
PID_DE
BOOL
PID_DIR BOOL
ERR_DBW REAL
6 - 1 8 4
Setting range
Integral gain (Ti or Ki)
(The selection of Ti or
Ki depends on the
setting of the
parameter PID_EQ.)
Derivative gain (Td or
Kd) (The selection of
Td or Kd depends on
the setting of the
parameter PID_EQ.)
Derivative action time
constant (Tf)
Selection of a PID
formula
Selection of the
calculation of the PID
derivative error
PID forward/reverse
direction
Range within which
the error value is
counted as 0
Description Device number
If Kc_Kp is equal
to 0 when the
independent
formula is used,
the proportional
control is not used.
It is an integral
Range of
gain. If an integral
positive single
gain is less than 0,
precision
Ti_Ki will be count
floating-point
as 0. If Ti_Ki is
values (Unit:
equal to 0, the
Ti=Second;
integral control is
Ki=1/second)
not used.
It is a derivative
Range of gain. If a derivative
positive single gain is less than 0,
precision Td_Kd will be
floating-point count as 0. If
values (Unit: Td_Kd is equal to
Second) 0, the derivative
control is not used.
It the derivative
action time
constant. If the
Range of derivative action
positive single time constant is
precision less than 0, Tf will
floating-point be count as 0. If Tf
values (Unit: is equal to 0, the
Second) derivative action
time control is not
used. (Derivative
smoothing)
TRUE：Dependent Formula
FALSE：Independent Formula
True: Using the variations in the PV to
calculate the control value of the
derivative (Derivative of the PV)
False: Using the variations in the
error (E) to calculate the control
value of the derivative (Derivative
of the error)
True: Reverse action (E=SV-PV)
False: Forward action (E=PV-SV)
An error (E) is
equal to SV− PV or
PV-SV. If the
Range of
setting value is 0,
single-precision
the function will not
floating-point
be enabled,
numbers
otherwise the CPU
module will check
whether the
present error is