To Next PageTo Next PageHow to fix A.521 autotuning alarm on YASKAWA Servo Drives?
To address an A.521 alarm (Autotuning Alarm) that occurs due to resonant sound or excessive vibration during position control, try the following: * Decrease the setting of Pn170 = n.X??? or the setting of Pn170 = n.?X??. * Increase the setting of Pn170 = n.X??? or decrease the setting of Pn170 = n.?X??.
What to do if autotuning without a host reference was not performed on YASKAWA Servo Drives?
If autotuning without a host reference was not performed, here are several possible causes and solutions: 1. If the main circuit power supply is OFF, turn it ON. 2. If an alarm or warning occurred, remove the cause of the alarm or warning. 3. If overtraveling occurred, remove the cause of overtraveling. 4. If the second gains were selected with the gain selection, disable automatic gain switching. 5. If the HWBB was activated, release the HWBB. 6. If the setting of the travel distance is too small, set the travel distance again in step 6 of the procedure. 7. If the settings for the tuning-less function are not correct, disable the tuning-less function (Pn170 = n.???0). Enable the tuning-less function (Pn170 = n.???1) and specify moment of inertia estimation.
General| Model | SGD7S |
|---|---|
| Type | Servo Drive |
| Category | Servo Drives |
| Manufacturer | YASKAWA |
| Humidity | 90% RH or less (non-condensing) |
| Vibration Resistance | 5.9 m/s² (0.6 G) at 10 to 60 Hz |
| Pollution Degree | 2 |
| Output Power | Varies by model |
| Control Method | Speed, Torque, Position Control |
| Communication Interface | MECHATROLINK-III, EtherCAT |
| Protection Functions | Overcurrent, Overvoltage, Undervoltage, Overheat, Encoder Error |
| Ambient Temperature | 0 to +55°C (32 to 131°F) |
| Storage Temperature | -20 to 85°C |
| Shock Resistance | 49 m/s² (5 G) |
| Altitude | 1000m or less above sea level |
| Installation | Panel-mounted |
| Cooling Method | Natural Convection or Forced Air Cooling |
| Weight | Varies by model |
Provides detailed electrical ratings and specifications for various SERVOPACK models.
Illustrates standard wiring examples for connecting SERVOPACKs to motors and peripheral devices.
Provides precautions regarding installation near heat sources, vibration sources, and environmental factors.
Covers essential safety precautions for wiring and inspections, including danger and warning statements.
Provides fundamental wiring diagrams for connecting SERVOPACKs, motors, and peripheral devices.
Details wiring procedures for main circuit and control circuit power supply inputs for different power types.
Details wiring for connecting SERVOPACKs to servomotors, including encoders and holding brakes.
Describes I/O signals for SERVOPACK (CN1) and INDEXER Module (CN11) input/output connectors.
Describes wiring requirements for safety functions, including HWBB and EDM1 signals.
Explains parameter classification, notation, setting methods, write prohibition, and initialization.
Details settings for AC (single/three-phase) and DC power supply inputs for SERVOPACKs.
Details how to reverse Servomotor rotation direction by changing parameter Pn000.
Guides on using SigmaWin+ to write motor parameters to the linear encoder.
Covers overtravel signals and parameters for specifying motor stopping methods.
Explains using holding brakes to maintain position when the SERVOPACK is OFF.
Details methods for stopping the Servomotor when the servo is turned OFF or an alarm occurs.
Explains how to reset multiturn data and clear alarms for absolute encoders.
Details setting any position as the origin for absolute linear encoders and adjusting PnB25 offset.
Describes input signals (/S-ON, P-OT, N-OT, etc.) and output signals (ALM, /WARN, /BK, /S-RDY, etc.).
Explains how to reset the SERVOPACK internally to restore default settings or clear alarms.
Explains automatic and manual adjustment of motor current detection offset to reduce torque ripple.
Outlines the procedures for trial operation of Rotary and Linear Servomotors, including preparations.
Lists essential checks before trial operation, covering wiring, power supply, and mounting.
Details using jog operation for trial runs of the Servomotor without host controller connection.
Provides an example of trial operation using digital I/O and serial commands for system checks.
Guides on performing trial operation with the Servomotor connected to the machine, including safety precautions.
Lists crucial precautions for safe tuning, covering overtravel, torque limits, and deviation alarms.
Explains automatic adjustment for stable response, including application restrictions and troubleshooting.
Describes automatic adjustment based on internal references, covering parameters and troubleshooting.
Explains automatic adjustment using operation references from the host controller for fine-tuning.
Describes manually adjusting servo gains during operation using reference input for fine-tuning.
Details the HWBB safety function for shutting off motor current via a hardwired circuit.
Details how errors are displayed, lists all alarms with meanings and causes, and explains resetting alarms.
Lists warnings that occur before alarms, their meanings, and troubleshooting steps.
Provides troubleshooting steps for common Servomotor issues like not starting, abnormal speed, and vibration.
