B&B Electronics DTB Series user manual Alarm Outputs, Alarm Type Alarm Output Operation

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8

Alarm Outputs

There are up to three groups of alarm outputs and each group allows thirteen alarm types in the initial setting mode. The alarm output is activated whenever the process temperature value (PV) is getting higher or lower than the set point of alarm limit.

Set

Alarm Type

 

Alarm Output Operation

Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

Alarm function disabled

Output is OFF

 

 

 

 

 

 

 

 

 

 

 

1

Deviation upper- and lower-limit:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value is higher than the setting value SV+(AL-H) or lower than the OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

setting value SV-(AL-L).

SV-(AL-L) SV

SV+(AL-H)

2

Deviation upper-limit:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value is higher than the setting value SV+(AL-H).

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SV

SV+(AL-H)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

Deviation lower-limit:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value is lower than the setting value SV-(AL-L).

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SV-(AL-L) SV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

Reverse deviation upper- and lower-limit:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value is in the range of the setting value SV+(AL-H) and the setting OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

value SV-(AL-L).

SV-(AL-L) SV

 

SV+(AL-H)

5

Absolute value upper- and lower-limit:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value is higher than the setting value AL-H or lower than the setting

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

value AL-L.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL-L

 

AL-H

6

Absolute value upper-limit:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value is higher than the setting value AL-H.

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL-H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

Absolute value lower-limit:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value is lower than the setting value AL-L.

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL-L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

Deviation upper- and lower-limit with standby sequence:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value reaches set point (SV value) and the value is higher than the OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

setting value SV+(AL-H) or lower than the setting value SV-(AL-L).

SV-(AL-L) SV

 

SV+(AL-H)

9

Deviation upper-limit with standby sequence:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates when PV value reaches set point (SV value) and the reached value is higher OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SV

 

 

 

 

 

 

 

 

 

 

 

 

than the setting value SV+(AL-H).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SV+(AL-H)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

Deviation lower-limit with standby sequence: this alarm output operates when PV value reaches the set

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

point (SV value) and the reached value is lower than the setting value SV-(AL-L).

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SV-(AL-L) SV

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

Hysteresis upper-limit alarm output:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates if PV value is higher than the setting value SV+(AL-H). This alarm output is OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF when PV value is lower than the setting value SV+(AL-L).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL-L AL-H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

Hysteresis lower-limit alarm output:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm output operates if PV value is lower than the setting value SV-(AL-H). This alarm output is OFF OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

when PV value is higher than the setting value SV-(AL-L).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL-H AL-L

13

CT alarm output:

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This alarm operates when the current measured by transformer (CT) is lower than AL-L or higher than OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL-H (This alarm output is available only for the controller with current transformer).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AL-L SV

 

 

AL-H

14When program control is end status, alarm output is ON.

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

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

17When SOAK status happens to PID program control, alarm output is ON.

18When RUN status happens to PID program control, alarm output is ON.

Note: AL-H and AL-L include AL1H, AL2H, AL3H and AL1L, AL2L, AL3L

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Contents DTB Series DTB Series PrecautionDisplay, LED and Pushbuttons Ordering InformationTemperature Sensor Type and Temperature Range SpecificationsOperation Scale = 2.8uA = 1.3mV for tuning output value Controller. Display when valveSignal feedback function is on When valve feedbackKey simultaneously, the Lock status can be released Dual Loop Output Control Heating / Cooling ControlAlarm Type Alarm Output Operation Alarm OutputsPID Control Current Transformer CT FunctionEvent Inputs Function PID Program Control Ramp/Soak Program ControlRS-485 Communication Hysteresis setting value of the 2ndPattern 0 time is set to 2080H~2087H 20BFHTerminals Identification Panel Cutout and Terminals IdentificationDTB4848 DTB9696 External DimensionsDTB4824 DTB4896Mounting Method Error Acknowledge and DisplayCT Wiring Method if CT function is selected Mounting

DTB Series specifications

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The DTB devices leverage advanced technologies to ensure high-speed data transmission. With support for data rates up to 115.2 kbps, they enable rapid communication across significant distances. This is particularly beneficial in settings where timely data exchange is critical, such as in manufacturing floors or utility management systems. Moreover, the devices are engineered to maintain data integrity, employing robust error-checking mechanisms and reliable power supply options.

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Additional features include LED indicators for monitoring power and communication status, which enhances user control and troubleshooting capabilities. With an easy-to-install design, the DTB Series allows for seamless integration into existing systems, reducing the time and effort required for setup.

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