Linear Gauge Properties - Threshold tab

Enter the minimum value of the linear gauge. This is only available if

Use variable

is cleared.

Enter the maximum value of the linear gauge. This is only available if

Use variable

is cleared.

Select this check box if you plan to use the

Minimum

and

Maximum

connections on the

Connections

tab for the linear gauge's value range.

Select the color for the normal operating range on the linear gauge.

Select this check box if you plan to use the

High High

,

High

,

Low

, and

Low Low

connections on the

Connections

tab for the linear gauge's thresholds.

The current value is compared against the values of the thresholds. To enable any threshold, select the associated check box. The thresholds' check boxes are only available if

Use variable

is cleared.

Thresholds trigger visual alerts when values reach or cross predefined boundaries to help maintain system stability. For example, when a process variable crosses a threshold, it indicates an issue or deviation from the desired operation. You must respond with actions to prevent deviations and maintain optimal performance.

Select the color for the threshold on the linear gauge when the current value does not reach it.

Select the color for the threshold on the linear gauge when the current value reaches or crosses it.

Select this check box to enable the alarm indicator on top of the linear gauge to blink when the current value reaches or crosses a threshold at runtime.

The current value is compared against the values of the control limits. To enable any control limit, select the associated check box. The control limits' check boxes are only available if

Use variable

is cleared.

Control limits are predefined limits that help ensure safe and efficient operations by preventing alarm conditions. These limits help maintain process quality by monitoring critical variables, such as temperature or pressure, and adjusting operations to prevent deviations that might lead to defects, safety hazards, or inefficiencies. For example, if the ideal temperature of a reactor is 100°C, the control limits might be set at 95°C and 105°C. If the temperature goes beyond these limits, the PID controller will take corrective actions to bring back the variable within the acceptable range.

Select this check box if you plan to use the

Control limit High High

,

Control limit High

,

Control limit Low

, and

Control limit Low Low

connections on the

Connections

tab for the linear gauge's control limits.

Select the icon size for the control limits.

Select the color for the control limits when the current value does not reach or cross the control limit.

Select the color for the control limits when the current value reaches or crosses the control limit.