Displays the status of a boolean value as an indicator lamp. The value can be a ComfileHMI variable, or can be read from a connected external device ¹⁾.

• Reversed Display - If this checkbox is check the lamp will be ON if the value read from the external device is 0 and OFF if the value read is 1, opposite from the default behavior.

if the value read is 0 then off, not 0 then on

The lamp's state can be determined dynamically though an expression. If the expression evaluates to 0, the lamp is off. If the expression evaluates to anything non-zero, the lamp is on.

The following video illustrates a lamp being turned on or off by modifying a single variable.

Back to ComfileHMI

To have the lamp blink, select the “Blink when ON” checkbox.