Azbil C35 Series User Manual

5-28
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION

Just-FiTTER
This Just-FiTTER function provides the effect of the overshoot suppression and the
following items can be set:
Item (Bank) Display Contents Initial value User level
Just-FiTTER assistance
coefficient
(Extended tuning bank)
0 to 100
(“0”: JF function disabled)
0 Standard,
High function
Just-FiTTER settling band
(Extended tuning bank)
0.00 to 10.00% 0.30% High function
• When the control method is other than the ON/OFF control (
CtrL
≠ 0), the
display and setting can be configured.
• Function of Just-FiTTER assistance coefficient (
JF.Ov
)
When the Just-FiTTER assistance coefficient (
JF.Ov
) is set to “0”, the Just-
FiTTER function becomes invalid.
When this coefficient is “1” or more, the effect of the overshoot limit/restraint/
control becomes larger as the coefficient becomes larger.
• Function of Just-FiTTER settling band (
JF.bd
)
When the % value of the width of the absolute value deviation to the PV range is
larger than the set value, the Just-FiTTER function is started. When this value
is smaller than the set value, this is judged as that the PV is settled by the Just-
FiTTER function.

RationaLOOP
This RationaLOOP function suppresses the unstable trend if the immediate
response to external disturbance is increased by the high precision control logic.
The following items can be set:
Item (Bank) Display Contents Initial value User level
Control algorithm
(Extended tuning bank)
0: PID (Conventional PID)
1: RationaLOOP (High-performance PID)
0 Standard,
High function
• When the control method is other than the ON/OFF control (
CtrL
≠ 0), the
display and setting can be made.

SP lag
This SP lag function suppresses changes in MV when the SP is changed. The
following items can be set:
Item (Bank) Display Contents Initial value User level
SP lag constant
(Extended tuning bank)
0.0 to 999.9
(No effect when set at “0.0”.)
0.0 High function
• When the control method is other than the ON/OFF control (
CtrL
≠ 0), the
display and setting can be made.
• Function of SP lag constant (
SP.LG
)
When the SP lag constant is set at "0.0", the SP lag function becomes invalid.
When this value is "0.1" or more, changes in MV when the SP is changed become
smaller and the effect of the overshoot suppression becomes larger as the value
becomes larger.

Azbil C35 Series Specifications

General

Brand	Azbil
Model	C35 Series
Category	Controller
Language	English