Omron C200H-TV Series Operation Manual page 34

Parameter Displays and Settings
Alarm Hysteresis (Display Level 1)
Heater Current Monitor (Display Level 1)
Heater Burnout Detection Current (Display Level 1)
30
Hysteresis is applied in the following situations.
When ON/OFF control is selected (i.e., when SW203-1 is ON).
When advanced PID control is selected (i.e., when SW203-1 is OFF) and P
(proportional band) is 0.
PV
SV
Alarm hysteresis prevents alarm output chattering and eliminates noise in-
fluences. It is invalid when both alarm mode 1 and alarm mode 2 are "0."
When switching from OFF to ON, operation proceeds at the set point. When
switching from ON to OFF, a hysteresis SV operating band is provided which
may be either higher or lower than the set point, depending on the alarm mode.
Upper Limit Mode
Hysteresis
OFF
The alarm output is OFF if the present temperature lies within the hysteresis
band when the Unit is turned on.
PV
SV
Note Cannot be set.
Valid for C200H-TV 03 (current output type).
PV
SV
Invalid for C200H-TV 03 (current output type).
Make the setting using one of the two values shown in the table below. Refer to
Appendix C Heater Burnout Detection for more details about the alarm SVs.
0.0 No heater burnout detection. Alarm signal OFF.
50.0 No heater burnout detection. Alarm signal ON.
Alarm hysteresis parameter symbol
Alarm hysteresis of currently selected loop
(Unit: C or F)
ON
ON
Set point
Heater current monitor parameter symbol
Heater current of currently selected loop
(Unit: Ampere). Monitored every 500 ms.
Heater burnout detection current parameter
symbol
Heater burnout detection current of currently
selected loop (Unit: Ampere)
The setting can be changed from this display.
Section 3-4
Lower Limit Mode
Hysteresis
OFF
Set point