8-69
IM 05P01C31-01EN
Control Functions
8.2.1 PID Control
Description
PID control is a general control using control-related parameters PID.
When PID control is selected, PID should be obtained by auto-tuning after setting SP or
PID should be set manually.
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 control
CTL
P
Proportional band
Heating-side
proportional band
(in Heating/cooling
control)
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
Heating-side
integral time (in
Heating/cooling
control)
EASY
OFF: Disable
1 to 6000 s
D
Derivative time
Heating-side
derivative time (in
Heating/cooling
control)
EASY
OFF: Disable
1 to 6000 s
Pc
Cooling-side
proportional band
EASY
0.0
to999.9%
Cooling-side ON/OFF control applies
when0.0%inHeating/coolingcontrol.
Ic
Cooling-side
integral time
EASY
OFF: Disable
1 to 6000 s
Dc
Cooling-side
derivative time
EASY
OFF: Disable
1 to 6000 s
MR Manual reset EASY -5.0

to

105.0%
PIDN
PID number
selection
EASY
1 to 8 SP
PIDG.
Number of PID
groups
STD 1 to 8 CTL
Note 1: The PID number (1 to 8, or R) is displayed on Group display while the parameter P, I, D, Pc,
Ic, Dc, or MR is displayed.
Note 2: In Cascade control, the LP2 lamp is lit while the Loop-2 parameter is displayed.
Note 3: The parameter CNT of Loop 2 displays PID and H/C.
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
8.2SettingControlType(CNT)
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