6.5 Alarm Detection 6.5 Alarm Detection Alarms are drive protection functions that do not operate the fault contact. The drive will return to original status when the cause 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 Solutions Table 6.8 Alarm Codes, Causes, and Possible Solutions Troubleshooting 6 SIEP C710606 33A OYMC AC Drive – J1000 User Manual 129 LED Operator Display Minor Fault Name bb Baseblock Drive 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 output LED Operator Display Minor Fault Name CALL Serial Communication Transmission Error Communication has not yet been established.
Cause Possible Solutions Minor Fault (H2-01 = 10) Communications wiring is faulty, there is a short circuit, or something is not connected properly. • Check for wiring errors. • Correct the wiring. • Remove and ground shorts and reconnect loose wires. YES Programming error on the master side. Check communications at start-up and correct programming errors. YES Communications circuitry is damaged. • Perform a self-diagnostics check. • Replace the drive if the fault continues to occurs. YES Terminal 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.
YES LED Operator Display Minor Fault Name CE MEMOBUS/Modbus Communication Error Control 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 OYMC or another type of shielded line. The shield should be grounded on the controller side or on the drive input power side.
• Separate all wiring for communications devices from drive input power lines. Install a noise filter to the input side of the drive input power. YES Communication protocol is incompatible. • Check the H5 parameter settings as well as the protocol setting in the controller. • Ensure settings are compatible. YES The communication cycle is longer than 2 seconds. • Check the PLC. • Change the software settings in the PLC. YES Incompatible PLC software settings or there is a hardware problem. • Check the PLC. • Remove the cause of the error on the controller side. YES Communications cable is disconnected or damaged. • Check the connector for a signal through the cable.
• Replace the communications cable. YES LED Operator Display Minor Fault Name CrST Can Not Reset Cause Minor Fault Possible Solutions Output (H2-01 = 10) Fault reset was being executed when a run command was entered. • Ensure that a run command cannot be entered from the external terminals or option unit during fault reset. • Turn off the run command. YES LED Operator Display Minor Fault Name EF Forward/Reverse Run Command Input Error Both forward run and reverse run closed simultaneously for over 0.5 s. Cause Possible Solutions Minor Fault Output (H2-01 = 10) Sequence error Check the forward and reverse command sequence and correct the problem. Note:
When minor fault EF detected, motor ramps to stop. YES