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FRONT PANEL OPERATION
The programming menu consists of two blocks—SETUP MENU AND
SYSTEM MENU. At power up, the controller will be in the operational
mode– process variable (PV), in the case of CN4420, and both process
variable and setpoint variable (SV), in the case of CN4520, CN4620,
CN4720 will be displayed. PV is the variable that is being controlled, and
it is not programmable. When setting the parameters, turn off the power
to the load (operating equipment) to ensure safety. Allow 30 minutes for
the unit to stabilize in terms of temperature, and to achieve the rated
accuracy. Option-related features are displayed only when the options
are provided.
Viewing and Setting Parameters
• After setting the data, press ENT key for registration.
• If the data setting is left as it is for 30 secs, the display is automatically
returned to the operational mode.
How to set Setpoint value (SV)
Operation
Display
1. Power on
– Operational mode
2. Press UP (units, tens or hundreds) – SV value changes accordingly
key or DOWN key
3. Press ENT key
– SV value entered into memory
• To set a negative setpoint value, press the hundreds key so that the
digit in the hundreds place starts blinking. Press the DOWN key until a
negative value is reached.
