PROCESS CONTROL SYSTEM AND METHOD WITH MULTIPLEXED INPUT-OUTPUT DEVICE

摘要

A process control system and method is provided. The system comprises a process control device for issuing a requirement command with an added address and/or group ID and a plurality of multiplexed output devices which receive the requirement command and execute a process on the basis thereof. The addresses have a same part or the group ID that are set the same for the devices. Each device compares the same part (or the group ID) with a part of a further address (or group ID) added to the received requirement command. If the same part is equal to the part of the further address, the requirement command is identified. The address is then compared with the further address based on a result of the identification. If the address is equal to the further address added to the requirement command, the process based on the requirement command is executed.