5-12
<Toc>
<5. Parameters>
IM 05D01C12-41E
4th Edition: May 31, 2006-00
●
Control Action-related Parameters
Output velocity limiter
OFF (0)
0.1 to 100.0%/second.
can limit control output velocity
OFF (0)
AUTO (0)
PID control mode
0: Standard PID control (with output bump at SP change)
1: Fixed value control (without output bump at SP change)
Choose “Fixed Value Control” when controlling pressure
or flow rate.
0
Anti-reset windup
(Excess integration
prevention)
AUTO (0), 50.0 to 200.0%
Used when the control output travels up to
100% or down to 0% and remains there.
The larger SP, the sooner PID computation
(integral computation) stops.
Zone PID selection
0: SP selection
1: Zone PID
0
Restart mode
Restart timer
CONT (0): Continues action set before power failure.
MAN (1): Starts from manual operation status
AUTO (2): Continues action set before power failure
in automatic operation.
CONT (0)
0 to 10 second.
Sets time between power on and the
instant where controller starts computation.
0 second.
PID group number
1 to 8
Determines operating parameter PID display
group number.
4
Zone PID reference
point-1
Zone PID reference
point-2
Zone PID reference
point-3
Zone PID reference
point-4
Zone PID reference
point-5
Zone PID reference
point-6
0.0 to 100.0% of PV input range.
Note that 1.RP
2.RP
3.RP
4.RP
5.RP
6.RP.
Set ZON PID selection (ZON) parameter to “1”.
The example below sets reference points 1
and 2 to provide 3 zones to switch PID
constants automatically. A maximum of 7
zones are settable.
100% value of
PV input range
Zone switching
hysteresis
0.0 to10.0% of PV input range span
Allows a hysteresis to be set for switching
at a reference point.
0.5% of PV
input range
span
Reference deviation
OFF (0), 0.0 to100.0% of PV input range span
Used to select PID constants according to a deviation from
the setpoint. The maximum group of PID constants is used
when the controller fails to keep track of the deviation.
OFF (0)
(OPR)
(MOD)
(AR)
(ZON)
(R.MD)
(R.TM)
(GRP)
(1.RP)
(2.RP)
(3.RP)
(4.RP)
(5.RP)
(6.RP)
(RHY)
(RDV)
Parameter
Symbol
Name of Parameter
Setting Range and Description
Initial Value
User Setting
Target Item
in CD-ROM
Time
Maximum value of
PV input range
RH
Reference point 2
2.RP
Minimum value of
PV input range
RL
Reference point 1
1.RP
Zone 3
Operates using the
3rd group of PID
constants
Zone 2
Operates using the
2nd group of PID
constants
Zone 1
Operates using the
1st group of PID
constants
PV input
Setpoint
Ref.2.1(2)
Ref.2.1(4)
Ref.4.1(2)
Ref.4.1(1)
Ref.4.1(2)
same as
above
same as
above
same as
above
same as
above
same as
above
same as
above
same as
above
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