YOKOGAWA NEW GREEN SERIES, User Manual

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<Toc> <5. Parameters>
IM 05D01C12-41E 4th Edition: May 31, 2006-00
5.2 Lists of Parameters
This section describes the functions of parameters briefly. In addition, each parameter table
has a “User Setting” column, where you can record your setpoints when setting them in the
controller.
* Parameters relating to PV or setpoints should all be set in real numbers.
For example, use temperature values to define target setpoints and alarm setpoints
for temperature input.
* The “User Setting” column in the table is provided for the customer to record setpoints.
* The column “Target Item in CD-ROM” in the table provides references from User’s
Manual (Reference) (CD-ROM Version) which describes items in more detail and
items that are not contained in this manual.
* Numbers in ( ) are the parameter setpoints that apply when the communication func-
tion is used. ex. REM (1), LCL (0).
■
Operating Parameters
Parameter
Symbol
Name of Parameter Setting Range and Description Initial Value User Setting
Target Item
in CD-ROM
Alarm 1-setpoint
Alarm 2-setpoint
Alarm 3-setpoint
Alarm 4-setpoint
PV alarm / SP alarm: -100.0 to
100.0% of PV input range
Deviation alarm: -100.0 to 100.0%
of PV input range span
Output alarm: -5.0 to 105.0%
Timer alarm (for alarm 1 only):
0.00 to 99.59 (hour, min) or
(min, sec)
These Alarm setpoint parameters
are common to the parameters
1.SP to 8.SP. PV high limit/SP high limit
alarm: 100.0% of PV
input range
Deviation alarm: 0.0% of
PV input range span
Other PV/SP low limit alarm:
0.0% of PV input range
Output high limit alarm: 100.0%
Output low limit alarm: 0.0%
Remote/local switching REM (0): remote operation
LCL (1): local operation LCL (0)
Run/stop switching Stop (1): operation stopped
Run (0): operation started RUN (0)
Auto-tuning OFF (0): No auto-tuning
1: Auto-tuning for 1.SP
2: Auto-tuning for 2.SP
3: Auto-tuning for 3.SP
4: Auto-tuning for 4.SP
5 to 8: Perform auto-tuning on a group
basis in the same way as 1 to 4
9: Performs auto-tuning to all groups 1 to 8. OFF (0)
“Super” function
OFF (0)
(A1)
(A2)
(A3)
(A4)
(AT)
(SC)
(R/L)
(S/R)
Ref.4.1(1)
Ref.2.1(5)
Ref.2.1(6)
same as
above
same as
above
same as
above
OFF (0): Disable
1: Overshoot suppressing function
Suppresses overshoots generated by abrupt
changes in the target setpoint or by
disturbances.
2: Hunting suppressing function (Stable mode)
Suitable to stabilize the state of control when
the load varies greatly, or the target setpoint is
changed.
Enables to answer the wider characteristic
changes compared with Response mode.
3: Hunting suppressing function (Response mode)
Enables quick follow-up and short converging
time of PV for the changed target setpoint.
Note: Use “SUPER” function (SC) 2 or 3 in PID
control or PI control.
“SUPER” function 2 or 3 is not available in the
following controls:
1) ON/OFF control
2) P control (control for proportional band only)
3) PD control (control for proportional band and
derivative item only)
4) Heating/cooling control
Do not use hunting suppressing function when
control processes with response such as flow or
pressure control.