Detect String Change 1Ch

The Detect String Change 1Ch detects and counts changes of string values. Therefore, case sensitivity can be taken into account or not.

Optionally, a Boolean signal can be selected for the Enable Execution input so that the algorithm is only active if the value of the selected signal is TRUE.

Configuration Options

• Case Sensitivity: If the checkbox is ticked off, case sensitivity is taken into account, otherwise not.

Output values

• String Changed: TRUE, if a string change was detected, otherwise FALSE.
• Count: Count up every time Boolean Switch is TRUE.
• Last Event: Indicates the time of the last triggered event → the event can be dragged and dropped into the Scope chart to display it as a trigger-event

Standard HMI Controls

For the Detect String Change 1Ch algorithm, the following HMI controls are available for generating an Analytics Dashboard:

1. The Comparison control visualizes the output values Boolean Switch and Count.

2. The SingleValue control visualizes the output values Count and Last Event.

3. The BinaryState control visualizes the output value Boolean Switch.

4. The Table Control or Multivalue Control visualizes all output values: Operation Out, Count, Last Event.

Alternatively, customer-specific HMI controls can be mapped in the Detect String Change 1Ch algorithm using the Mapping Wizard.