Omron C200H-TV Series Operation Manual page 33

Parameter Displays and Settings
Cooling Coefficient (Display Level 1)
Control Period (Display Level 1)
Hysteresis (Display Level 1)
PV
SV
This sets the coefficient for finding the cooling P constant. It is valid when
SW203-1 is OFF (PID control). The formula for calculating the cooling P
constant is as follows:
Cooling P constant = heating P constant x cooling coefficient
The I/D constant is the same for cooling as for heating.
PV
SV
PV
SV
This sets the control period. It is valid when SW203-1 is OFF (PID control), and
only when the heater model is not the C200H-TV 03 (current output type).
Cooling loop 1 is invalid when SW203-6 is ON (current output).
The control period is the time required to complete one transistor output or volt-
age output ON/OFF cycle.
ON
OFF
PV
SV
Hysteresis prevents control output chattering and eliminates noise influences.
When switching from ON to OFF, operation proceeds at the set point. When
switching from OFF to ON, operation proceeds at a lower point determined by
the hysteresis SV, as shown in the following illustration.
ON
Cooling coefficient parameter symbol
Cooling coefficient of currently selected loop
Heating control period parameter symbol
Heating control period of currently selected loop
(Unit: seconds)
Cooling control period parameter symbol
Cooling control period of currently selected loop
(Unit: seconds)
ON time
Control period
Hysteresis parameter symbol
Hysteresis of currently selected bank and loop
(Unit: C or F)
Hysteresis
Set point
Section 3-4
OFF
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