CONTROL APPARATUS FOR USE IN DISTRIBUTED CONTROL SYSTEM AND UNITS

摘要

A remote unit includes a base unit having a function to communicate through a network and an add-on unit connected through the base unit to the network. The base unit includes a CPU that receives from a programmable logic controller through the network an add-on unit parameter that determines the operation of the add-on unit and a base unit internal memory that stores the add-on unit parameter received from the programmable logic controller. The add-on unit includes a CPU that acquires from the base unit an add-on unit parameter stored in the base unit internal memory to reflect the add-on unit parameter in the operation of the add-on unit.

主权项

1. A control apparatus for use in a distributed control system, the control apparatus being connected through a network to a controller to serve as a master station and serving as a remote station of the distributed control system, the control apparatus comprising:
a base unit having a function to communicate through the network and an add-on unit connected to the network through the base unit, wherein the base unit includes a base unit central controller to receive from the controller through the network an add-on unit parameter that determines an operation of the add-on unit and a base unit internal memory to store the add-on unit parameter received from the controller, and the add-on unit includes an add-on unit central controller to acquire, at starting up of the control apparatus for use in a distributed control system, from the base unit the add-on unit parameter stored in the base unit internal memory and to reflect the add-on unit parameter in the operation of the add-on unit.