If there are Enums defined outside the min/max range of the Signal, a Boolean port for each Enum is added to the receive driver Transform. The new port is named <OriginalSignalName>_<EnumName>. For example: Frm_Slave1Counter_SNA as shown here:
To use the new Signal, export it from the receive driver and add it to your TestCase.
When the original Signal is set to a defined logical value the corresponding new logical Signal transitions to 1. It transitions back to 0 zero when the value of the original Signal is returns to its min/max range. The first Signal does not show data while a logical Signal is active.
In the example above, transitions 2 and 3 on the LIN Network 1 bus have the Signal set to SNA. When that out-of-range value is detected, and that value has an Enum defined, the corresponding Boolean Signal is set to 1, and null data is transmitted on the LIN Signal.