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 –
SP.
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)
Содержание UTAdvanced UP55A
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