Chapter 2. LED Operation and Connector Details22 PACSystems* RX3i PROFINET IO-Scanner User Manual GFK-2737F2.1.8.1 Fatal Error CodesWhen the PNS encounters a fatal error, it will blink an error code pattern on the OK LED with an Ambercolor or on the STATUS LED with a Green color. In this mode all LEDs flash Green once to indicate the startof the error code. Next the OK or STATUS LED blinks a 4-digit decimal error code. The LED first blinks toindicate the most significant error digit, then after a brief pause blinks again to indicate the nextsignificant error digit and so forth. After another brief pause, all LEDs flash Green again and the error codepattern repeats. Repetitions continue indefinitely until the module is power-cycled.2.1.8.2 Module IdentificationThe LEDs on a PNS module can be commanded to repeatedly turn ON and OFF in a special sequence, tohelp locate or identify the module: First the green LEDs are turned on in the following circular order: OK, LAN, STATUS, CONN, PORT 4,PORT 3, PORT 2, PORT 1. There is a short delay between turning on each LED. The LEDs are then turned off in the same order. There is a short time delay between turning off eachLED.The Module Identification LED Pattern is initiated by the PROFINET DCP Identify Device command. ModuleIdentification can be initiated using the Proficy Machine Edition Discovery Tool by refreshing the devicelist, double clicking on the RX3i PNS module, and clicking the Identify Device button on the PNS propertiespop-up window.2.1.8.3 Microprocessor Over TemperatureIf the maximum threshold temperature for the PNS’s microprocessor is crossed, the PNS goes into power-saving mode. While the PNS is in an over-temperature condition, the following blink patterns arealternated:• PORT 1, PORT 2, and STATUS LEDs turn on RED for 0.5 seconds (all other LEDs off)• Then PORT 3 and PORT 4 LEDs turn on RED for 0.5 seconds (all other LEDs off)The PNS stays in power-saving mode until the temperature drops to a safer level. Once a safetemperature is reached, the PNS module restarts.Note: Under certain ambient operating temperatures, the PNS may momentarily display the overtemperature pattern during power-up while it is calibrating its thermal protection functions. Thisindication can be ignored.2.1.8.4 Firmware UpdateWhile the PNS is in firmware update mode, the OK, LAN, and STATUS LEDs blink Green for 0.5 seconds andthen off for 0.5 seconds in unison. During firmware update operation, the ports are disabled, so all of thePORT LEDs are off and the CONN LED is off. The USB LED operates normally displaying the condition of theUSB port.2.1.8.5 Internal UpdateSome changes from a firmware update are applied to the system on the next power up. During thisinternal update process, the STATUS and LAN LEDs blink Green for 0.5 seconds and then off for 0.5seconds in unison. At the completion of the internal update process, the PNS restarts and should powerup normally.