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Hysteresis is an operating band provided for ON/OFF operation to prevent out-
put chattering (repeated ON/OFF switching) and eliminate noise influences.
ON
OFF
Hysteresis
SV
Hysteresis is applied in the following situations.
•
When ON/OFF control is selected (SW203-1 is ON).
•
When PID control with feed-forward circuitry (SW203-1 is OFF) and P (propor-
tional band) is 0.
Bank Number (Display Level 0)
PV
SV
Bank number parameter symbol
Currently set bank number.
During control operation: Executed bank number (default value = 1)
Control operation interrupted: Currently displayed bank number
Changing the Settings
The bank number can be changed from the Data Setting Console in the following
situations.
•
When the CPU Unit is set to PROGRAM mode and SW203-5 on the rear panel
is set to ON to interrupt temperature control.
•
When the Stop Bit (word n+2, bit 06 for loop 1 or bit 04 for loop 2) is ON.
When the above conditions are not met, the executed bank number cannot be
changed from the Data Setting Console and the executed bank number (default
value = 1) is displayed. Change the executed bank number with a user program
or with a device, such as the Programming Console.
Copy Bank (Display Level 2)
Copies the data, except for the SV (set value) data, from bank number 1 to banks
2 to 8.
PV
SV
Execute bank copy
Bank being copied
Bank copy completed
Sensor-type Monitor (Display Level 2)
PV
SV
Sensor-type monitor parameter symbol
Sensor type currently set with SW202 on the rear panel. Num-
ber refers to the following if a platinum resistance thermometer
is used:
0: JPt (OFF), 1: Pt (ON)
Auto-tuning Start/Stop (Display Level 2)
PV
SV
AT
AT start
Process value (PV)
Set point (SP)
AT indicator
blinks
AT executing
Parameter Displays and Settings
Section 3-4
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