12-1312.3.4 Recovery Possible ErrorThese error codes are displayed if an error occurs in the communication control unit.If one of these errors occurs, the E1 LED on the front panel of the ET-LAN unit flashes.Code Name Description Step to take RemarkA001H UDP check sumerrorThe checksum value of theUDP packet received from thepartner node is erroneous.Send the data once againfrom the partner node.If any of theseerrors occur, the E1LED on the frontpanel of the ET-LAN unit flashes.A002H UDP/IP levelerrorCommunication processing wascarried out with a different portnumber than the one registeredfor UDP.Carry out thecommunication processingwith the correct portnumber.A003H TransmissionerrorThis error indicates that anotification was received fromthe transmission section of theunit.Carry out the transmissionprocessing again.A004H IP processingerrorError notification was receivedfrom the IP.Assembly timeout error: Duringassembly of the IP split data,the remaining data was notreceived within the allowed timelimit.Specified IP address does notexist:There was no response to anARP request for the specifiedIP address of the partner node.Checksum error:This notification is received ifthe IP header checksum valueof an IP packet that has beenreceived is not correct.Internal resource error:This notification is received ifthe IP resource is insufficient.Different IP address wasspecified for sub-networkaddress from that of sourcenode.This notification is received ifthe IP address specified for thepartner node is different fromthat of the source node. Thisdoes not occur if a routeraddress was specified,however.Carry out the transmissionprocessing again.If communication cannotbe performed after theoccurrence of error, usethe reset function or turnthe power off and onagain.
