Yaskawa V1000 AC Drive

The software base block function is currently assigned to one of the digital inputs and that input is in the 'off' state. This condition actively prevents the drive from accepting any Run commands, effectively stopping motor operation for safety or control reasons.

The internal braking transistor within the drive, which is responsible for dissipating regenerative energy from the motor, has malfunctioned or failed. This is a hardware fault within the drive that can prevent proper braking, lead to DC overvoltage faults, or cause unstable operation.

This fault occurs due to electrical interference causing communication data errors within the control circuit, impacting reliable drive control. The drive detects this error if it fails to receive control data correctly within the detection time set by H5-09. Unresolved communication errors can lead to unpredictable drive behavior and system instability.

This fault indicates issues stemming from incorrectly set motor parameters, excessive load inertia, an inappropriate stopping method, or incorrect motor/drive wiring. It can also be triggered if a Run command is received while the motor is coasting or if line-to-line resistance tuning has not been completed. The drive detects this fault if the torque reference exceeds the torque limit for 3 seconds or longer during deceleration, posing a risk of uncontrolled stopping or motor damage.

This fault activates when the monitored value, selected in H2-20 [Comparator 1 Monitor Selection], falls within the predefined range set by H2-21 [Comparator 1 Lower Limit] and H2-22 [Comparator 1 Upper Limit]. It signals that a critical process variable has entered a restricted operating window, indicating an abnormal condition that requires immediate investigation to prevent operational issues.

This fault triggers when the monitored value, chosen via H2-26 [Comparator 2 Monitor Selection], is found to be outside the acceptable operating range defined by H2-27 [Comparator 2 Lower Limit] and H2-28 [Comparator 2 Upper Limit]. This indicates a critical process parameter has deviated beyond its safe boundaries, suggesting a potential malfunction or abnormal system state that could lead to operational instability if not corrected.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault occurs if the drive's power supply was de-energized while a communication option card was writing parameters, or if an EEPROM peripheral circuit error occurred. This means data written to the drive's EEPROM may be corrupted, affecting parameter integrity and proper drive operation. This impacts the drive's ability to store and recall critical settings.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

This fault indicates that the terminal board is not correctly connected to the drive. This critical physical connection issue prevents proper communication and control signal input/output, rendering the drive inoperable. It must be resolved for the drive to function.

This fault indicates a general hardware problem within the drive's control circuit. Such internal issues can prevent the drive from functioning correctly and may lead to complete operational failure. Continued use with this fault can exacerbate internal damage to sensitive electronic components.

A fault reset command was input to the drive while an active Run command was still present. The drive cannot be reset under these conditions because it is still receiving an instruction to operate, creating a logical conflict.

This fault occurs if the drive attempts to start operation while residual induced voltage remains in the motor (e.g., during coasting to a stop or immediately after fast deceleration). Additionally, it can signify a drive hardware problem, where the current offset value exceeds the permitted setting range during the drive's automatic adjustment process. If not resolved, this can lead to incorrect motor control or further damage to the drive hardware.

This fault indicates either a problem within the drive’s internal control circuit or an improper connection of the terminal board to the main control board. It suggests an internal hardware malfunction or an installation error that affects the drive's core functionality and control integrity.

The drive's internal torque limit was exceeded for longer than 3 seconds during a deceleration phase, specifically when operating in Open Loop Vector control mode. This typically indicates that the load inertia is too high, the torque limit is set too low for the application, or the motor parameters programmed into the drive are incorrect.

The internal power supply providing voltage to the drive's control circuits is operating below its nominal level. This is an internal hardware fault that can prevent the drive's logic and control functions from operating correctly, potentially leading to system instability or failure to start.

There is a fault within the drive's internal charge circuit, which is responsible for gradually charging the DC bus capacitors upon power-up. This failure prevents the drive from safely starting, as the charge circuit protects against high inrush currents that could damage components.

The DC bus voltage inside the drive has risen beyond its acceptable operating limit. Common causes include excessively short deceleration times, disabled stall prevention, a malfunctioning braking chopper or resistor, unstable motor control, or an excessively high input voltage. This condition poses a risk of damage to the drive's internal DC link capacitors and power components.

The voltage on the internal DC bus has fallen below the minimum detection level (L2-05). This usually indicates a failure of the main power supply, a lost input phase, or an insufficient power supply capacity to meet the drive's demands. This condition causes the drive to shut down or operate erratically.

The load on the motor is too heavy for the drive's capacity, or the drive is being operated with too much torque at low speeds, causing its output current to exceed safe limits. Sustained overload can lead to the drive's thermal shutdown and potentially cause damage to its power semiconductor components.

The drive detected a watchdog circuit exception while receiving data from the MECHATROLINK controller, indicating a communication issue or severe electrical interference. This can lead to unreliable control of the connected motor and unexpected system shutdowns. If the error occurs frequently, it points to a critical stability problem in the communication link.

This fault occurs when both a forward and a reverse run command are simultaneously active for an extended period (longer than 0.5 seconds). This indicates a conflict in the control logic or wiring, leading to the motor ramping to a stop to prevent damage from conflicting directional commands. It is a critical safety interlock issue.

This fault occurs when the communication option card receives an external fault signal from the connected controller, or if a programming error exists on the controller side causing an external device's alarm function to activate. This indicates an issue originating from an external device or its control logic, leading to a protective shutdown of the drive.

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S1, or there is incorrect wiring to S1, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S2, or there is incorrect wiring to S2, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S3, or there is incorrect wiring to S3, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S4, or there is incorrect wiring to S4, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S5, or there is incorrect wiring to S5, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S6, or there is incorrect wiring to S6, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

This fault indicates that an external device triggered a fault via the Multi-Function Digital Input (MFDI) terminal S7, or there is incorrect wiring to S7, or the terminal is incorrectly configured for an external fault despite not being in use. This causes the drive to halt operation based on an external signal, potentially stopping connected machinery.

This fault signals a hardware problem with the drive's EEPROM or data corruption during a write operation, often due to electrical interference. The drive may not be able to reliably store or retrieve critical parameters, leading to unpredictable behavior or loss of configuration. Continuous operation risks data integrity and proper control.

This fault can occur due to two distinct conditions: either a forward and reverse command were simultaneously active for over 500ms, indicating a control signal conflict; or an external device triggered a fault via one of the digital inputs (S1-S6), pointing to an issue in an external safety or interlock circuit. Both scenarios lead to motor stoppage and require careful investigation of control logic and external devices.

The ground leakage current on the drive's output side has surpassed 50% of the drive's rated output current. This often indicates damaged motor or cable insulation, or excessive stray capacitance due to long cable runs. This condition poses a serious electrical safety hazard and potential damage to the motor or drive.

The temperature of the drive's heatsink has exceeded its safe operating threshold. This usually points to inadequate cooling caused by high ambient temperatures, a malfunctioning or stopped cooling fan, a dirty heatsink, or restricted airflow around the drive. This condition can lead to thermal derating, drive shutdown, and reduced equipment lifespan.

One or more of the incoming power supply phases to the drive has been lost or experienced a significant voltage drop. This can result from issues in the upstream power grid, tripped circuit breakers, blown fuses, or loose wiring connections at the drive's input terminals. This leads to unbalanced operation and potential damage to the drive.

The motor is experiencing a load that exceeds its rated capacity, especially when operating at low speeds with heavy loads. This can also result from excessively short acceleration/deceleration cycles or an incorrect motor rated current setting in the drive. Prolonged motor overload leads to winding overheating and potential damage to the motor insulation.

An external fault condition was triggered by the upper controller via an installed option card. This indicates that a fault was detected in the external system connected to the option card, or the option card itself reported an issue to the main drive controller.

One or more phases on the drive's output to the motor are disconnected, the motor winding is damaged, or connections are loose at the drive output terminals. This can also occur if the motor is too small (drawing less than 5% of the drive's rated current), leading to unbalanced currents and potential motor heating.

An excessive current flow has been detected at the drive's output. This is typically caused by a short circuit or ground fault on the output side, an extremely heavy mechanical load, overly short acceleration/deceleration times, incorrect motor data, or switching a magnetic contactor at the output. This condition can severely damage the drive's power section (IGBTs).

Both Safe Disable inputs (H1 and H2) are detected as open, indicating that the drive's output is intentionally and safely disabled by an external safety circuit. This state prevents the motor from starting and is a normal condition when the machine's safety function is engaged.

The drive output is disabled, but only one of the Safe Disable inputs (H1 or H2) is detected as open, which indicates an abnormal condition. This could be due to an internal fault within one channel of the drive's safe disable circuit or an incorrect, asynchronous signal from the external safety controller.

This fault appears when a keypad containing a battery is connected, but its internal date and time settings have not been configured or are incorrect. While this fault does not directly impact the drive's motor control functions, it can affect the accuracy of event logging and timestamping for troubleshooting purposes. Parameter o4-24 [bAT Detection Selection] determines if this detection is enabled.

This fault indicates that the drive's output current dropped below the level set in L6-02 for longer than the time specified in L6-03. This is typically caused by a mechanical issue like a broken pulley belt, or by incorrect load parameters for the application. Continued undertorque can lead to inefficient operation, unnoticed mechanical failures, or unexpected machine stops.

This fault triggers when the drive's output current falls below the level set in L6-05 for longer than the time specified in L6-06. Similar to UL3, it's often caused by a machine problem like a broken pulley belt or misconfigured load parameters. Ignoring this can result in undetected mechanical problems, operational inefficiencies, or unexpected stops.

The drive detected undertorque conditions consistent with mechanical weakening or fatigue, as defined by the settings in L6-08 [Mechanical Fatigue Detect Select]. This fault suggests potential degradation of critical machine components or a loss of load. If unaddressed, this could lead to unexpected mechanical failure, loss of production, or unsafe operating conditions.

This fault occurs when the DC bus voltage drops below a critical detection level, which is approximately 190V for 200V class drives and 380V for 400V class drives (or 350V when E1-01 < 400V). Common causes include phase loss in the input power, loose wiring, unstable input voltage, or issues with main circuit capacitors or the soft-charge bypass relay. Persistent undervoltage can lead to unreliable drive operation, component damage, or complete shutdown of the system.

The keypad battery voltage has fallen below the acceptable threshold, indicating a low power state. If left unaddressed, this can lead to loss of real-time clock functionality or stored parameter values on the keypad. It is a precursor to complete battery failure.

This fault indicates an issue with Bluetooth communication between the drive's keypad and a connected smartphone or tablet using the DriveWizard Mobile application. Common causes include the mobile device being too far from the keypad or radio interference from other devices operating in the 2.4 GHz bandwidth. Loss of communication means remote monitoring and control capabilities are unavailable.

An error has occurred in the communication with an installed option card, such as a fieldbus communication card. This can stem from the drive not receiving a signal from the controller, incorrect or damaged communication cable wiring (short-circuited or disconnected), or significant electrical interference. An improperly installed or physically damaged option card can also trigger this fault, preventing the drive from responding to external commands.

The internal braking transistor is experiencing an overload, typically due to a high regeneration power or an excessive repetition frequency during braking cycles. This can also trigger if the transistor's protective function is enabled incorrectly while a regenerative converter is present, or if the transistor itself is faulty. Prolonged overload can lead to component damage and potential drive failure.

This fault indicates a temporary hardware problem in the drive's communication circuit, most likely caused by electrical noise. This can disrupt control signals and data exchange, leading to unstable operation or unexpected shutdowns. Persistent noise can cause further hardware degradation.

This fault indicates a temporary hardware problem in the drive's communication circuit, most likely caused by electrical noise. This can disrupt control signals and data exchange, leading to unstable operation or unexpected shutdowns. Persistent noise can cause further hardware degradation.

This fault occurs when the difference between the motor's detected speed and its commanded speed exceeds a set detection level (F1-10) for a specified duration (F1-11). Common causes include excessive load, improperly short acceleration/deceleration times, a mechanically locked-up load, or an engaged holding brake. This indicates the motor is not achieving its commanded speed, potentially leading to process delays or equipment damage if the load is stalled.

This fault indicates an error in the drive's EEPROM peripheral circuit or a problem with the EEPROM data itself, often stemming from a corrupted DriveWorksEZ program saved to the EEPROM. This issue affects the drive's ability to retain critical program data and configuration. If unresolved, the drive will fail to operate correctly or maintain its programmed parameters.

This fault signifies an error within the DriveWorksEZ program, indicating a logical or programming issue rather than a drive hardware fault. The program logic is causing an unexpected condition, preventing proper operation. Continued attempts to run without correcting the program could lead to incorrect machine behavior or unexpected stops.

This fault signifies an error within the DriveWorksEZ program, indicating a logical or programming issue rather than a drive hardware fault. The program logic is causing an unexpected condition, preventing proper operation. Continued attempts to run without correcting the program could lead to incorrect machine behavior or unexpected stops.

This fault signifies an error within the DriveWorksEZ program, indicating a logical or programming issue rather than a drive hardware fault. The program logic is causing an unexpected condition, preventing proper operation. Continued attempts to run without correcting the program could lead to incorrect machine behavior or unexpected stops.

This fault indicates the drive could not detect the motor's polarity within a pre-set length of time during startup or operation. This is typically caused by a disconnection in the motor coil winding or loose screws on the drive's output terminals. Failure to detect polarity prevents the drive from properly controlling the motor, making operation impossible.

This fault indicates that the drive's output current exceeded the level set in L6-02 for longer than the time specified in L6-03. This suggests a mechanical issue like a machine lock-up or that the load parameters are incorrectly configured. Leaving this unresolved can lead to continued machine stress, overheating, or damage to connected equipment.

This fault triggers when the drive's output current surpasses the level set in L6-05 for longer than the time specified in L6-06. Similar to oL3, it points to a machine issue, such as a locked rotor or improperly set load parameters. Persistent overtorque can lead to mechanical strain, premature equipment wear, or even motor damage.

The drive detected overtorque conditions consistent with mechanical weakening or fatigue, as defined by the settings in L6-08 [Mechanical Fatigue Detect Select]. This fault indicates potential degradation of crucial machine components, such as bearings or gearboxes. If ignored, this could lead to catastrophic mechanical failure and significant downtime.

This fault occurs when the load inertia is too large, an external force rotates the motor during deceleration, or something prevents proper deceleration on the load side. The output frequency remains constant longer than the n3-04 [HSB Overload Time] setting. This indicates that the drive's high slip braking mechanism is being overstressed, potentially leading to drive or motor damage if unresolved.

The value set for parameter o2-04, which specifies the drive's capacity, does not match the actual installed drive's capacity. This configuration error prevents the drive from accurately recognizing its specifications and operating correctly.

One or more drive parameters have been set to a value that falls outside their permissible setting range. This prevents the drive from accepting the configuration and can lead to operational issues or prevent the drive from starting.

A contradictory setting has been assigned to one or more of the multi-function digital inputs (H1-01 through H1-06). This includes assigning the same function to multiple inputs (except 'External fault' and 'Not used'), setting incompatible functions, or configuring functions without their required counterparts, leading to control logic conflicts.

This error occurs either when the run command source (b1-02) or frequency reference source (b1-01) is set to an option board (value 3) that is not physically installed, or when the frequency reference source is set to pulse input but H6-01 is not set to 0. This indicates a conflict in the drive's control source configuration.

A conflict exists in the settings related to multi-function analog inputs H3-02 and H3-10 or PID functions. This could be due to H3-02 and H3-10 being set to the same value (excluding 0 and F) or PID functions being assigned to both analog inputs and the pulse input simultaneously, leading to ambiguities in control logic.

A parameter or function has been configured that is not supported or compatible with the currently selected control mode of the drive. This error often arises after a control mode change, requiring a thorough review of parameter settings to match the new mode of operation.

The V/f pattern settings are configured incorrectly, specifically violating the hierarchical rules for frequency points: E1-04 ≥ E1-06 ≥ E1-07 ≥ E1-09. This prevents the drive from accurately generating the required voltage-to-frequency characteristic curve necessary for proper motor control.

This fault indicates that the keypad is not securely connected to the drive's connector or that the connection cable is damaged or disconnected. This fault triggers when keypad disconnect detection is enabled (o2-06=1) and the drive is configured for keypad run command (b1-02=0) or is operating in LOCAL mode. A faulty connection prevents proper drive control and monitoring, impacting operational safety and efficiency.

This fault signals that the motor is operating at an excessively high speed, which can be caused by overshoot during acceleration/deceleration, incorrect PG (Pulse Generator) pulse settings in the drive, or an improperly configured overspeed detection level. Uncontrolled overspeed can lead to severe mechanical failure, component damage, and potential safety hazards for personnel and equipment.