Omega CN4000 Series - DISPLAY AND OPERATIONS; Display Window and Key Functions; LED Indicators and Status; Alarm Display and Indicators

DISPLAY AND OPERATIONS
① Upper display window, displays PV,
parameter code, etc.
② Lower display window, displays SV,
parameter value, or alarm
③ Setup key, for accessing parameter
table and conforming parameter
modification.
④ Data shift key, and auto tuning.
⑤ Data decrease key
⑥ Data increase key
⑦ LED indicator. MAN, PRG, MIO,
COM, OP2, AL2, AU1 and AU2
Com indicators is non-applicable.
OP1 and AL1 will indicate I/O operation of the corresponding module.
Basic display status:
When power on, the upper display window of the instrument shows the process
value (PV), and the lower window shows the set-point (SV). This status is called
basic display status.
When the input signal is out of the measurable range (for example, the
thermocouple or RTD circuit is break, or input specification sets wrong), the upper
display window will alternately display “orAL” and the high limit or the low limit of PV,
and the instrument will automatically stop output. If the lower display window
alternately display “HIAL”, “LoAL”, “HdAL” or “LdAL”, it means high limit alarm, low
limit alarm, deviation high alarm, and deviation low alarm happening.
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