YOKOGAWA UP55A - Page 200

8-53
IM 05P02C41-01EN
Control Functions
PV Derivative Type PID (output bump at SP change)
SP
PV
OUT
PV Derivative Type PID (output bumpless at SP change)
SP
PV
OUT
DeviationDerivativeTypePID
The PID control method in which derivative action works for the deviation value = PV –
S P.
The derivative action works for a SP change, so this method is useful for cases like
Cascade secondary-loop control where the SP-following capability is important.
The following shows the deviation derivative type PID control computation formula.
e e
P
OUT
+ +dt Td e
=
100
Ti
1
dt
d
∫






• •
where OUT: control output, e: deviation (PV-SP), P: proportional band, Ti: integral time,
and Td: derivative time
SP
PV
OUT
SettingDetails
Parameter
symbol
Name
Display
level
Settingrange Menusymbol
ALG PID control mode PRO
0: Standard PID control mode
1: Fixed-point control mode.
CTL
8
8.3SettingPIDControlMode(ALG)