Omega CN159, CN154 Screen instruction, Power on and initial screen display, Alarm type code table

4. Screen instruction

4-1. Power on and initial screen display

After turning on power, the display shows each power on initial screen for approx. 1.5 seconds, then moves into the basic screen of the mode 0 screen group.

Turning on power

screen	Series type (	,	)
	Input type (	: Thermocouple,		: R. T. D.,
initial		: Voltage (mV),		: Voltage (V),	: Current (mA))
	Displays output screen
on	Control output type		: Contact	: SSR drive voltage
			: Current	: Voltage
Power
	Lower limit of the selected measuring range
	Higher limit of the selected measuring range
	Mode 0 screen group basic screen
	Measured value (PV)
	Set value (SV)

4-2. Alarm type code table

Alarm code		AH	With/Without	AL/HB	With/Without
		assignment	inhibit action	assignment	inhibit action
0 (	)	Not assigned	– – – – –	Not assigned	– – – – –
1 (	)	Higher limit	Without	Lower limit	Without
		deviation value	inhibit action	deviation value	inhibit action
2 (	)	Higher limit	Without	Lower limit	Without
		absolute value	inhibit action	absolute value	inhibit action
3 (	)	Higher limit	With	Lower limit	With
		deviation value	inhibit action	deviation value	inhibit action
4 (	)	Higher limit	With	Lower limit	With
		absolute value	inhibit action	absolute value	inhibit action
5 (	)	Higher limit	Without	Heater break	– – – – –
		deviation value	inhibit action
6 (	)	Higher limit	Without	Heater break	– – – – –
		absolute value	inhibit action
7 (	)	Higher limit	With	Heater break	– – – – –
		deviation value	inhibit action
8 (	)	Higher limit	With	Heater break	– – – – –
		absolute value	inhibit action

Note: In the above table, the alarm codes 5 through 8 are selectable when the apparatus has the optional function of heater break alarm.

4-3. Screen change

(1) Screen change from mode 0 group to mode 1 group

• Pressing the key for three seconds on the basic screen of the mode 0 screen group changes it to the direct call screen of the mode 1 screen group and vice versa.

0-0 Basic Screen 1-0 direct call screen

key

3seconds

(2)Screen change from mode 0 group to mode 2 screen group

• Pressing the ENT key for five seconds on the basic screen of the mode 0 screen group changes it to the function selecting screen of the mode 2 screen group and vice versa.

0-0 Basic Screen	2-0 Function selecting screen
ENT	key

5 seconds

(3)Screen change within mode 0 screen group

•By pressing the key, the screen changes.

(4)Screen change within mode 1 screen group

•Two methods are used for screen change within mode 1

screen group. One is to press the key as shown on

above mode 0 screen group. The other is to mode the screen directly by indicating screen No. on the top direct call screen.

Example: Direct calling the screen No.8 PV bias value set screen

1-0 direct call screen	1-0 direct call screen	1-8 PV bias value set screen
key	ENT	key

several times point flashes

(5)Selecting and setting digit to change of function selecting screen of mode 2 screen group

•When the function selecting screen is displayed, the point of selectable digit flashes.

•By pressing ENT key, the selectable digit (digit whose point is flashing) moves.

•In case of changing the set value, flash the point to be

changed with ENT key, select data with the keys and press key again to register the set value and move

selectable digit.

Example: changing the control output characteristics from (heating) to (cooling)

ENT key key ENT key

*“.” on the screen shows the selectable digit (digit whose point is flashing).

Note: In case of changing data and pressing ENT key longer than 5 seconds, the screen moves to mode 0 basic screen without a data registration. It requires a data verification with ENT key and screen change.

(6)Shifting setting items on input scaling screen of mode 2 screen group and setting method

•Pressing the key on the function selecting screen calls the input scaling screen onto the display. The decimal

point in the rightmost position on the top row flashes.

Press the or key to change the lower limit value

and press the ENT key to register the data.

• Upon registering the lower limit value data, the decimal point in the rightmost digit in the bottom row begins to flash. Change the higher limit value by pressing the

or key and register it by means of the ENT key.

•Upon registering the higher limit value data, the decimal points in the rightmost digits of the bottom and top rows flash. Change the positions of the decimal points by

pressing the or key and register it by means of the ENT key.

•Each time the ENT key is pressed, the flashing decimal point in the rightmost digit moves from the top row→ bottom row→top and bottom rows→top row→.

•In case the lower limit value and the higher limit value are set to produce a difference which is less than 100 counts or more than 5000 counts, the higher limit value is forced to change to +100 or +5000 counts. The higher limit cannot be set to be less than a lower limit value +100 counts or more than a lower limit value +5000 counts.

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