Unit Functions and Restrictions1.1 Unit Functions and How They Work1.1.1 Functions of Cassettes Using these cassettes attached to the CPU unit enables analog I/O control.• An analog input and analog output can be controlled by attaching these extension cassettesto the CPU unit.• It is selectable from three types of cassettes in accordance with the intended use. Input and output with simple programs• For input data, a digital conversion value (0 to 4000) is read as an input device (WX).• For output data, a digital value (0 to 4000) is converted to analog output data by beingwritten into an output device (WY). The input and output range is switchable.• The range can be switched with the switches on each cassette. The current input is switchedaccording to wirings. Equipped with the thermocouple disconnection alarm function (Thermocouple inputcassette)• When a thermocouple is disconnected, the value is digitally converted to the fixed value(K8000) so that you can determine the situation is not normal.1.1.2 Types and Model Numbers of CassettesName Model No.FP7 ExtensionCassette(Function Cassette)Analog I/O cassette 2-ch Input, 1-ch output AFP7FCA21Analog input cassette 2-ch input AFP7FCAD2Thermocouple input cassette 2-ch input AFP7FCTC21-2