YASKAWA GA500 series AC micro frequency converter

Control signal: External control signals (such as limit switches, PLC commands) can respond normally.

Standard compliance and safety requirements

1. Main compliance standards

(1) EU CE certification

Applicable directives: Low Voltage Directive (LVD 2014/35/EU), Electromagnetic Compatibility Directive (EMC 2014/30/EU), Machinery Directive (MD 2006/42/EC);

Compliance requirements:

LVD: Complies with EN 61800-5-1:2007, insulation class II, overvoltage category III;

EMC: The built-in filter model must meet EN 61800-3:2004/A1:2012 standards for radiation and conducted disturbances;

MD: Cooperate with safety circuits (such as Safe Disable) to achieve PL e (Cat. III) safety level.

(2) UL certification in the United States and Canada

Applicable standards: UL 61800-5-1, Canadian Electrical Code (CEC);

Compliance requirements:

Branch circuit protection: designated semiconductor fuses (such as FWH-25A14F for B001 and FWH-200B for 4060) must be used;

Control circuit: UL certified Class 2 power supply is required, and the wire is NEC Class 1 conductor;

Motor protection: Electronic thermal protection must comply with NEC standards, and external thermal overload relays are required when driving multiple motors.

(3) Chinese standards

RoHS compliance: restrict six hazardous substances including lead, mercury, cadmium, etc., provide a list of hazardous substances and recycling labels;

Safety standard: Complies with GB/T 12668.2-2013 (Variable Speed Electrical Transmission Systems).

2. Core security requirements

(1) Electrical safety

Power off operation: Before wiring and maintenance, all power sources must be disconnected, and the capacitor must be discharged (the indicator light is off and the voltage is ≤ 50Vdc), waiting for at least 5 minutes;

Grounding requirements: The protective grounding wire must be firmly connected, virtual connection is prohibited, and it should not be shared with high current equipment such as welding machines for grounding;

Leakage protection: Drivers with built-in EMC filters may experience leakage currents exceeding 3.5mA, requiring the use of Type B RCM/RCD.

(2) Mechanical safety

Installation protection: The driver should be fixed on non combustible materials such as metal, and it is forbidden to cover the ventilation openings. There should be no flammable materials around;

Operation protection: Before testing and running, personnel and obstacles around the equipment need to be removed, and components such as couplings and shaft keys need to be installed;

Emergency stop: An emergency stop circuit must be configured independently of the driver to ensure that the power can be quickly cut off in case of a malfunction.

(3) Functional safety

Safe Disable function: Safe torque shutdown is achieved through H1, H2, and HC terminals, using Source mode with a wiring length of ≤ 30m;

Prevent sudden startup: The 3-wire control system needs to set A1-03=3330 and b1-17=0 to avoid automatic startup after power on;

Fault reset: After the fault occurs, it is necessary to first investigate the cause (such as overload, short circuit) before resetting. It is forbidden to force a reset directly.

Operation and maintenance

1. Network communication

(1) Supporting protocols and configurations

Core protocol: MEMOBU/Modbus (RS-485 interface), supports master-slave architecture, can communicate with PLC, touch screen and other devices;

Communication parameters: maximum baud rate of 115.2kbps, data format of 8-bit data bits+1-bit stop bit+no checksum (configurable);

Terminal resistor: The last driver in the network needs to enable the built-in 120 Ω terminal resistor through DIP switch S2 to reduce signal reflection.

(2) Communication function

Data exchange: capable of reading driver operating parameters (output frequency, current, voltage), modifying control parameters, and receiving external control commands;

Fault reporting: When the drive fails, the fault code can be actively reported through the communication protocol for remote diagnosis;

Multi machine linkage: supports networking of multiple drivers to achieve synchronous control (such as multi motor linkage in assembly lines).

2. Troubleshooting

(1) Fault classification and handling principles

Fault types: serious faults (such as overvoltage ov, overcurrent oC, motor overload oL1), minor faults/alarms (such as undervoltage UV, overheating OH), parameter errors (such as incorrect oPE parameter range);

Processing procedure:

Record fault codes (read through keyboard or communication);

Power off for cooling, check wiring (main circuit phase sequence, control circuit signal);

Verify parameters (motor parameters, protection parameters, control mode);

Test the load (whether it is stuck or overloaded);

If unable to troubleshoot, contact YASKAWA technical support.

(2) Common troubleshooting solutions

Fault code, fault cause, and solution

OV decelerates too quickly, brake resistor fault, high grid voltage prolongs deceleration time (C1-02), check the wiring and resistance of the brake resistor, and detect the grid voltage

Overload of oL1 motor, incorrect motor parameter settings, poor cooling to reduce load, re-enter motor nameplate parameters, clean drive ventilation port