A PLC function incorporating drive control device , comprising: a PLC unit having a ladder arithmetic unit that carries out a ladder arithmetic and an arithmetic operation unit that carries out an arithmetic operation; a drive control unit that controls a load using a drive main circuit ; and a control parameter information storage unit having a control parameter identifier setting region, in which is stored an identifier of a read target or write target control parameter among control parameters of the drive control unit , and a control parameter storage region in which a value of a control parameter is temporarily stored correlated to the relevant identifier, wherein the drive control unit includes a control parameter exchange control unit that reads a value of a control parameter corresponding to an identifier specified as a read target in the control parameter identifier setting region from the drive control unit and writes the value into the control parameter storage region, and reads an update value of a control parameter corresponding to an identifier specified as a write target in the control parameter identifier setting region from the control parameter storage region and writes the update value into the drive control unit , wherein a PLC unit side control parameter identifier and a drive control unit side control parameter identifier are stored correlated for each control parameter in the control parameter identifier setting regior; and the PLC function incorporating drive control device is further characterized in that the control parameter identifier setting region includes transfer direction information for each control parameter indicating whether a control parameter is a control parameter transferred from the PLC unit to the drive control unit or a control parameter transferred from the drive control unit to the PLC unit . a PLC unit having a ladder arithmetic unit that carries out a ladder arithmetic and an arithmetic operation unit that carries out an arithmetic operation; a drive control unit that controls a load using a drive main circuit ; and a control parameter information storage unit having a control parameter identifier setting region, in which is stored an identifier of a read target or write target control parameter among control parameters of the drive control unit , and a control parameter storage region in which a value of a control parameter is temporarily stored correlated to the relevant identifier, wherein the drive control unit includes a control parameter exchange control unit that reads a value of a control parameter corresponding to an identifier specified as a read target in the control parameter identifier setting region from the drive control unit and writes the value into the control parameter storage region, and reads an update value of a control parameter corresponding to an identifier specified as a write target in the control parameter identifier setting region from the control parameter storage region and writes the update value into the drive control unit , wherein a PLC unit side control parameter identifier and a drive control unit side control parameter identifier are stored correlated for each control parameter in the control parameter identifier setting regior; and the PLC function incorporating drive control device is further characterized in that the control parameter identifier setting region includes transfer direction information for each control parameter indicating whether a control parameter is a control parameter transferred from the PLC unit to the drive control unit or a control parameter transferred from the drive control unit to the PLC unit . <EOS>