YOKOGAWA UT55A User Manual

8-86
IM 05P01C31-01EN
OperationDescription
The parameters that perform gain operation (feedforward gain (FGN)) and bias operation
(feedforward input bias (FBI) and feedforward output bias (FBO)) for a disturbance
measurement input signal (feedforward input (FF_CTL)) are provided.
FIN
iswithin
therangeof-100.0to100.0%.FF_CTLiswithintherangeof-5.0to105.0%
Analog input scale (AIN2 or AIN4) for the feedforward input is necessary to be set to “0 to
100.”
FIN = FGN
OUT = OUTc + FIN
+ FBO






• FF_CTL + FBI
1 + FLG
• s
1
where OUT: control output, OUTc: feedback control output, s: Laplacian operator,
FF_CTL: feedforward input, and FLG: feedforward first-order lag time constant
Feedforward input can be confirmed using LL50A Parameter Setting Software.
Setting Details
Parameter
symbol
Name
Display
level
Setting range Menusymbol
CNT Control type EASY
PID: PID control
ONOF: ON/OFF control (1
point of hysteresis)
ONOF2: ON/OFF control (2
points of hysteresis)
2P2L: Two-position two-level
control
H/C: Heating/cooling control
S-PI: Sample PI control
BATCH: Batch PID control
FFPID: Feedforward controll
CTL
P Proportional band) EASY
0.0to999.9%
When0.0%isset,itoperates
as0.1%.
Heating-side ON/OFF control
applieswhen0.0%inHeating/
cooling control.
PID
I Integral time EASY
OFF: Disable
1 to 6000 s
D Derivative time EASY
OFF: Disable
1 to 6000 s
PIDN PID number selection EASY 1 to 8 SP
PIDG. Number of PID groups STD 1 to 8 CTL
FLG
Feedforwardrst-order
lag time constant
PRO
OFF, 1 to 120 s
TUNE
FGN Feedforward gain -9.999 to 9.999
FBI Feedforward input bias -100.0to100.0%
FBO
Feedforward output
bias
-999.9to999.9%
Note
When changing the setpoint of the parameter PIDG., if the setpoint of the parameter PIDN
which belongs to the SP menu is larger than that of the parameter PIDG., the PIDN setpoint is
changed to the PIDG. setpoint.
8.2SettingControlType(CNT)

YOKOGAWA UT55A Specifications

General

Brand	YOKOGAWA
Model	UT55A
Category	Temperature Controller
Language	English