Names and Functions of PartsFP2−CCU2 − 32.1 Names and Functions of Parts2.1 Names and Functions of Parts2.1.1 Names and Functions of PartsFront Back1 Operating status LEDsThis displays the operating status of the unit, such as communication conditionsand error/alarm situations.2 COM.1 port (RS232C) and COM.2 port (RS232C)These ports are used to connect the RS232C connector of an RS232C device suchas a personal computer or display panel, using a shielded cable.3 Transmission format setting switchThese switches are used to set the transmission speed (baud rate) and characterbit for the COM.1 and COM.2 ports. The values set by these switches areautomatically reflected when the power supply is turned on. For other informationon the transmission format, please see page 3 − 3.4 Backplane connectorThis connector is used to connect the Computer Communication Unit to thebackplane.The settings of the transmission format setting switches become effectivewhen the power supply is turned on.Tip