Delta DT3 - Manual (Page 16)

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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.
¾ Cannot 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
Value
Alarm Type Alarm Output Operation
0 Alarm function disabled
1
Deviation upper- and lower-limit:
This alarm output operates when PV value is higher than the setting value SV+(AL-H)
or lower than the setting value SV-(AL-L).
ON
OFF
SV-(AL-L) SV SV+(AL-H)
2
Deviation upper-limit:
This alarm output operates when PV value is higher than the setting value SV+(AL-H).
ON
OFF
SV SV+(AL-H)
3
Deviation lower-limit:
This alarm output operates when PV value is lower than the setting value SV-(AL-L).
ON
OFF
SV-(AL-L) SV
4
Absolute value upper- and lower-limit:
This alarm output operates when PV value is higher than the setting value AL-H or
lower than the setting value AL-L.
ON
OFF
AL-L AL-H
5
Absolute value upper-limit:
This alarm output operates when PV value is higher than the setting value AL-H.
ON
OFF
AL-H
6
Absolute value lower-limit:
This alarm output operates when PV value is lower than the setting value AL-L.
ON
OFF
AL-L
7
Hysteresis upper-limit alarm output:
This alarm output operates if PV value is higher than the setting value SV+(AL-H). This
alarm output is OFF when PV value is lower than the setting value SV+(AL-L).
ON
OFF
AL-L AL-H
8
Hysteresis lower-limit alarm output:
This alarm output operates if PV value is lower than the setting value SV-(AL-H). This
alarm output is OFF when PV value is higher than the setting value SV-(AL-L).
ON
OFF
AL-L AL-H
9
Disconnection 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
AL-H.
12
CT2 Alarm: CT2 is ON if the value of CT2 is lower than the value of AL-L or higher than
AL-H.
ON
OFF
AL-L AL-H
13
When SOAK status (temperature hold) happens to PID program control, alarm output
is ON.
14 When RAMP UP status happens to PID program control, alarm output is ON.
15 When RAMP DOWN status happens to PID program control, alarm output is ON.
16 When RUN status happens to PID program control, alarm output is ON.