PLC and DCS systems are generally applicable to discrete and process manufacturing,respectively.A discrete manufacturing facility that uses a PLC system,generally consisting of separate production units,primarily used to complete the assembly of parts,such as labeling,filling,or grinding.Process manufacturing facilities,often using automated systems,produce to recipe rather than piece in a continuous and batch process.Large continuous processing facilities,such as oil refineries and chemical plants,use DCS automation systems.Hybrid applications often use both PLC systems and DCS systems.Selecting a controller for an application requires consideration of the size of the process,scalability and future update plans,integration needs,functionality,high availability,and return on investment over the entire life cycle of the plant facility.
PLC和DCS系统一般分别适用于离散和过程生产制造。使用PLC系统的离散生产制造设施，一般由单独的生产装置组成，主要用于完成部件的组装，例如打标签、填充或研磨等。过程制造设施，通常使用自动化系统，以连续和批处理的方式按照配方而不是按件生产。大型连续加工设备，如炼油厂和化工厂，都使用DCS自动化系统。混合应用通常同时使用PLC系统和DCS系统。为某个应用选择控制器，需要考虑过程的规模、可扩展性和未来的更新计划、集成需求、功能、高可用性以及工厂设施整个生命周期的投资回报等等诸多因素。
HP/Agilent 5087-7128 TBR Multiplier Amplifier, 20GHz
HP/Agilent 8648D/SN:3623A01510 Signal Generator,9 KHz –
HP/Agilent 8648D/SN:3642U02071 Signal Generator,9 KHz –
HP/Agilent E4433B/OPT:1E5 ESG-D Series Digital RF Signa
HP/Agilent E4433B ESG-D Series Digital RF Signal Genera
HP/Agilent E4403-60074 3GHZ RF Assy, opt 1D5
HP/Agilent E4422B ESG-A Series Analog RF Signal Genera
