4 Option Components14 YASKAWA ELECTRIC TOBP C730600 84D YASKAWA AC Drive Option SI-N3 Installation Manualn Power-Up DiagnosticsAn LED test is performed each time the drive is powered up. The initial boot sequence maytake several seconds. The option is successfully initialized when the LEDs complete thediagnostic LED sequence. The LEDs then assume operational conditions shown in Table 3.Table 4 Power-Up Diagnostic LED SequenceNS– OFF Offline or Power supply OFF –Green ON Online communicationsestablishedDevice is on-line and has connections in theestablished state.Green Flashing Online communications notestablishedDevice is on-line but has no connections in theestablished state.Duplicate MAC ID test has been passed and is on-linebut has no open connections to other nodes.Red ON Communications errorAn error occurred disabling DeviceNetcommunications.• MAC ID duplication• Bus off detectedRed Flashing Communications time-out A communications time-out occurred with the master.Green/Red Flashing Communication faultedSpecific communication faulted device.• The device has detected a network access error andis in the communications faulted state.• The device has then received and accepted anIdentify communication fault request-long protocolmessage.Sequence Module Status (MS) Network Status (NS) Time (ms)1 Green OFF 2502 Red OFF 2503 Green Green 2504 Green Red 2505 Green OFF -Name Display Operating Status DescriptionColor Status