The A_COMMAND parameter is an interface to the named set associated with the equipment module. In the example, A_COMMAND is associated with the totalizer named set. To enable an operator to specify a named state for the TOTALIZER equipment module on a DeltaV Live display, you must create a named set datalink on the display, and the datalink expression must reference the equipment module's A_COMMAND parameter. (For example, DLSYS["TOTALIZER_1/A_COMMAND"].)