YOKOGAWA UP750, User Manual

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6-16
<Toc> <6. Parameters>
IM 05E01B02-41E 1st Edition : May 31,2000-00
Zone switching
hysteresis 0.0 to10.0% of PV input range span
Allows hysteresis to be set for switching at a reference point. 0.5% of PV
input range
span
Reference deviation Used to select a group of PID parameters according to a deviation from
the given program setpoint. The controller uses the PID parameters of the
number selected in PID group number (GRP) if the PV input falls outside
the given deviation range. The following example shows a case when only
the reference deviation is set without setting any reference point.
The selected group of PID parameters is as follows.
Since region 1 is within the deviation range, the controller uses the 1st
group of PID parameters.
Since region 2 is outside the deviation range, the controller uses the
PID parameters of the number selected in PID group number (GRP). OFF (0)
RHY1
RDV1
OFF (0): Disable
0.0% to 100.0% of PV input range span
Reference deviation (RDV1)
Maximum value of
PV input range
Minimum value of
PV input range
Target setpoint
Segment 1 Segment 2
PV input value
Reference deviation (RDV1)
[1]
[2]
[2]
[1]
[1]
[2]
A slope is set to vary
the program setpoint.
Parameter
Symbol
Name of Parameter Setting Range and Description Initial Value User
Setting
Target Item
in CD-ROM
RH1
RL1
●
Analog Input Computation Parameters
Located in: Main menu =
CMLP
; Submenu =
AIN
Parameter
Symbol
Name of Parameter Setting Range and Description Initial Value User
Setting
Target Item
in CD-ROM
Ref.1.1(6)
Ref.1.1(3)
Ref.1.1(6)
Ref.1.1(3)
Ref.1.1(6)
Ref.1.1(3)
Analog input-1 bias Used to correct the PV input value beforehand.
When in normal operation, use the PV Input Bias (BS) operating
parameter.
-100.0% to 100.0% of PV input range span
0.0% of PV
input range
span
Analog input-1 filter OFF (0): Disable
1 to 120 sec.
OFF (0)
A.BS1
A.FL1
A.SR1
A.LC1
Analog input-1
square-root
computation Performs square-root computation for the PV input value.
OFF (0): Do not compute the square root
ON (1): Compute the square root
OFF (0)
Analog input-1 low
signal cutoff 0.0% to 5.0%
The slope equals “1” at levels below the low-signal cutoff point.
1.0%
A.BS2
Although not used in single-loop control, it is shown on the display.
A.FL2
Although not used in single-loop control, it is shown on the display.
A.SR2
Although not used in single-loop control, it is shown on the display.
A.LC2
Although not used in single-loop control, it is shown on the display.
A.BS3
Although not used in single-loop control, it is shown on the display.
A.FL3
Although not used in single-loop control, it is shown on the display.
A.SR3
Although not used in single-loop control, it is shown on the display.
A.LC3
Although not used in single-loop control, it is shown on the display.