6.5 Alarm DetectionAlarms are drive protection functions that do not operate the fault contact. The drive will return to original status when thecause of the alarm has been removed.During an alarm condition, the Digital Operator display flashes and an alarm output is generated at the multi-function output(H2-01), if programmed.Investigate the cause of the alarm and refer to Table 6.8 for the appropriate action.u Alarm Codes, Causes, and Possible SolutionsTable 6.8 Alarm Codes, Causes, and Possible SolutionsLED Operator Display Minor Fault Namebb BaseblockDrive output interrupted as indicated by an external baseblock signal.Cause Possible Solutions Minor Fault(H2-01 = 10)External baseblock signal entered via multi-function input terminal (S1 to S5). Check external sequence and baseblock signal input timing. No outputLED Operator Display Minor Fault NameCALL Serial Communication Transmission ErrorCommunication has not yet been established.Cause Possible Solutions Minor Fault(H2-01 = 10)Communications wiring is faulty, there is ashort circuit, or something is not connectedproperly.• Check for wiring errors.• Correct the wiring.• Remove and ground shorts and reconnect loose wires.YESProgramming error on the master side. Check communications at start-up and correct programming errors. YESCommunications circuitry is damaged. • Perform a self-diagnostics check.• Replace the drive if the fault continues to occurs. YESTerminal resistance setting is incorrect. The terminal slave drive must have the internal terminal resistance switch set correctly.Place DIP switch S2 to the ON position. YESLED Operator Display Minor Fault NameCE MEMOBUS/Modbus Communication ErrorControl data was not received correctly for two seconds.Cause Possible Solutions Minor Fault(H2-01 = 10)A data error occurred due to noise.• Check options available to minimize the effects of noise.• Counteract noise in the control circuit wiring, main circuit lines and ground wiring.• Reduce noise on the controller side.• Use surge absorbers on magnetic contactors or other equipment causing the disturbance.• Use cables recommended by Yaskawa or another type of shielded line. The shield shouldbe grounded on the controller side or on the drive input power side.• Separate all wiring for communications devices from drive input power lines. Install anoise filter to the input side of the drive input power.YESCommunication protocol is incompatible. • Check the H5 parameter settings as well as the protocol setting in the controller.• Ensure settings are compatible. YESThe communication cycle is longer than 2seconds.• Check the PLC.• Change the software settings in the PLC. YESIncompatible PLC software settings or thereis a hardware problem.• Check the PLC.• Remove the cause of the error on the controller side. YESCommunications cable is disconnected ordamaged.• Check the connector for a signal through the cable.• Replace the communications cable. YESLED Operator Display Minor Fault NameCrST Cannot Reset6.5 Alarm Detection140 YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manualhttp://nicontrols.com
