Delta DT3 instruction sheet Alarm Outputs, Al-H

screen . If the password is incorrect, the screen will return to PV/SV display mode.

3.Enter the new password two times in the screen. The screen will return to PV/SV display mode with the keys unlocked. If the two entries of password are not the same, the screen will go back to the state of step 2.

¾Cannot remember the password:

Restore factory settings to release the locking.

Alarm Outputs

Two alarm outputs are provided in the machine, a maximum of 3 alarm outputs can be expanded. A total of 19 Independent alarm settings can be made as listed in the table. Additional settings are provided, such as alarm delay, alarm standby, alarm output hold, alarm reverse output, and alarm peak record, as described as follows:

a、 Alarm Delay Setting: Sets alarm delay time. When the movement conforms to the alarm setting mode, controller will delay the generation of an alarm signal; an alarm will only be activated when the alarm conditions remains confirmed within the delayed period of time.

b、 Alarm Standby Setting: An alarm detection will only be activated when the measured value falls within the ±5 range of the specified input value, so as to prevent an alarm activation on the start-up if the condition conforms to the alarm setting.

c、 Alarm Output Hold Setting: The alarm message will be held when the alarm activates, unless the control switches off the alarm.

d、 Alarm Reverse Output Setting: An alarm output can be set for NC( Normal close) or NO(Normal Open).

e、 Alarm Peak Record Setting: For recording the peak value of the alarm signal.

	Set	Alarm Type			Alarm Output Operation
	Value
0		Alarm function disabled
1		Deviation upper- and lower-limit:	ON
		This alarm output operates when PV value is higher than the setting value SV+(AL-H)	OFF
		or lower than the setting value SV-(AL-L).	SV-(AL-L)			SV	SV+(AL-H)
2		Deviation upper-limit:	ON
			OFF
		This alarm output operates when PV value is higher than the setting value SV+(AL-H).				SV	SV+(AL-H)
3		Deviation lower-limit:	ON
			OFF
		This alarm output operates when PV value is lower than the setting value SV-(AL-L).				SV
				SV-(AL-L)
4		Absolute value upper- and lower-limit:	ON
		This alarm output operates when PV value is higher than the setting value AL-H or	OFF
		lower than the setting value AL-L.			AL-L			AL-H
5		Absolute value upper-limit:	ON
			OFF
		This alarm output operates when PV value is higher than the setting value AL-H.						AL-H
6		Absolute value lower-limit:	ON
			OFF
		This alarm output operates when PV value is lower than the setting value AL-L.			AL-L
7		Hysteresis upper-limit alarm output:	ON
		This alarm output operates if PV value is higher than the setting value SV+(AL-H). This	OFF
		alarm output is OFF when PV value is lower than the setting value SV+(AL-L).				AL-L	AL-H
8		Hysteresis lower-limit alarm output:	ON
		This alarm output operates if PV value is lower than the setting value SV-(AL-H). This	OFF
		alarm output is OFF when PV value is higher than the setting value SV-(AL-L).			AL-H	AL-L

9Disconnection Alarm: This alarm output operates if the sensor connection is incorrect or has been disconnected.

10	Time Counter Alarm
11	CT1 Alarm: CT1 is ON if the value of CT1 is lower than the value of AL-L or higher than	ON
	AL-H.
		OFF
12	CT2 Alarm: CT2 is ON if the value of CT2 is lower than the value of AL-L or higher than		AL-L	AL-H
	AL-H.

13When SOAK status (temperature hold) happens to PID program control, alarm output is ON.

14When RAMP UP status happens to PID program control, alarm output is ON.

15When RAMP DOWN status happens to PID program control, alarm output is ON.

16When RUN status happens to PID program control, alarm output is ON.

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