Chapter 2. CPU Features & SpecificationsGFK-2222AD April 2018 912.3.2 CPE010, CPE020 and CRE020Serial Ports CPE010, CPE020 & CRE020Each CPU has three independent, on-board serial ports, accessed by connectors onthe front of the module. COM1 and COM2 provide serial interfaces to external devices;either can be used for firmware upgrades. The third on-board serial port is a dedicatedEthernet Station Manager port. For serial port pin assignments, electrical isolationand details on serial communications, refer to Chapter 5.Ethernet Ports CPE010, CPE020 & CRE020Two RJ45 ports support Ethernet communications. Refer to RX7i Embedded EthernetInterface for details.CPU Indicators CPE010, CPE020 & CRE020Three CPU LEDs indicate the operating status of various CPU functions.Two Comm LEDs indicate activity on COM1 and COM2.LED StateOn Blinking Off CPU Operating StateOK On Green CPU has passed its power-up diagnostics and isfunctioning properly.Off CPU problem. EN and RUN LEDs may be blinkingin an error code pattern, which can be used bytechnical support for troubleshooting. Thiscondition and any error codes should bereported to your technical supportrepresentative.Blinking GreenOther LEDs offCPU in Stop/Halt state; possible watchdog timerfault. Refer to the fault tables. If PME cannotconnect, cycle power with battery attached andrefer to fault tables.OK Blinking in unison CPU is in boot mode and is waiting for afirmware update through a serial port.RUNENARUN On Green CPU is in RUN ModeOff CPU is in STOP Mode.ENA On Green Output scan is enabled.Off Output scan is disabled.C1(COM1)Blinking Green Signals activity on corresponding serial port.C2(COM2)Figure 30:CPE010 FrontView
