PM865K01 3BSE031151R1 ABB

Analog control

A/D and D/A conversion modules are configured in the PLC.The A/D module can convert on-site analog quantities such as temperature,pressure,flow,and speed into digital quantities,which are then processed by the microprocessor in the PLC(the microprocessor can only process digital quantities),and then Control;or become analog after conversion by D/A module,and then control the controlled object,so that PLC control of analog quantity can be realized.

模拟量控制

PLC中配置有A/D和D/A转换模块。A/D模块能将现场的温度、压力、流量、速度等模拟量转换变为数字量，再经PLC中的微处理器进行处理（微处理器处理的只能是是数字量），然后进行控制；或者经D/A模块转换后变成模拟量，然后控制被控对象，这样就可实现PLC对模拟量的控制。