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8 Data entry key
The key to be used for storing the data after pre-
vious data is changed. (none of changed data can
be registered unless this key is pressed.)
9 UP key for units place
By pressing once, the number in the units place
blinks. The number is continuously incremented
with the key held pressed.
10 UP key for tens place
By pressing once, the number in the tens place
blinks. The number is continuously incremented
with the key held pressed.
11 Up key for hundreds place
By pressing once, the number in the hundreds
place blinks. The number is continuously incre-
mented with the key held pressed. A numeric “9”
is followed by “0” and , concurrently, a number of
the thousands place is incremented by 1.
12 Control output indication lamp C (for CN4420 only): Comes on when the control
output is ON.
C1: Comes on when the control output 1 is ON.
C2: Comes on when the control output 2 is ON.
13 Upper limit alarm
Comes on when the upper limit alarm is activated.
indication lamp (option)
14 Lower limit alarm
Comes on when the lower limit alarm is activated.
indication lamp
15 Heater burnout alarm
Comes on when heater burnout alarm is output.
indication lamp
16 Process value (PV)/ set
Parameter symbols and codes are displayed
value (SV)/parameter display
for process value (PV) and set value (SV) and
(applicable to CN4420 only)
when setting various parameters.
17 Process value (PV)
Stays on while process value (PV) is displayed.
indication lamp
18 PV/SV SELECT key
The display of process value (PV) and set value
(For CN4420 only)
(SV) is toggled each time this key is pressed.
