Digital AC Servo Amplifier MR-J4-40B-RJ 400 W

Products Introduce

MR-J4-40B-RJ is an AC servo driver in the MELSERVO-J4 series, with a rated output of 0.4kW and a rated output current of 2.8A; the main circuit power input current is 2.6A, suitable for three-phase or single-phase AC200-240V (50/60Hz) power supply, and also supports DC283-340V DC input. The allowed voltage for AC input is 170-170V. The voltage fluctuates between 264V and DC input, the voltage fluctuation range is 241 – 374V.

FAQ:

1. What are the SSCNET III/H communication cycles supported by MR-J4-40B-RJ? What impact do different cycles have on control accuracy and response speed?

The SSCNET III/H communication cycles supported by MR-J4-40B-RJ are 0.222ms, 0.444ms, and 0.888ms:

1. 222ms: The shortest cycle, optimal control accuracy and response speed, can quickly respond to load fluctuations, and is suitable for high-precision equipment; but the network load is the largest.
2. 444ms: Taking into account both performance and load, it meets the needs of most common automation scenarios and is a commonly used configuration.
3. 888ms: The longest period, the lowest accuracy and responsiveness, but the smallest network load and the strongest stability, suitable for extensive control scenarios.

2.How is the STO safety function of the MR-J4-40B-RJ wired and enabled, and are additional safety loop accessories required?

1. Wiring: Connect the external safety relay through the STO1/STO2 terminal of the CN8 connector; the TOFB terminal can be connected to feedback the STO status. The wiring needs to control the test pulse OFF time ≤1ms.
2. Enable: Use MR Configurator2 software after wiring, stop the motor first, and set STO1/STO2 to OFF to trigger the function; adjust parameter Pr.PF18, and set STO1/STO2 to ON during normal operation.
3. Basic scenario of accessory requirements: Safety relays that meet specifications and meet basic SIL3 requirements are required.
4. High safety level/extended function scenario: additional safety equipment such as MR-D30 functional safety unit or MR-J3-D05 is required.

3.What specific debugging and diagnostic functions can be achieved when MR-J4-40B-RJ is connected to MR Configurator2 software via USB?

1. Parameter configuration and copying: You can choose function display or list display mode to set parameters. You can view detailed explanations of parameters during setting. It can also display multi-axis parameters in batches and configure them uniformly. It supports parameter copy, paste and reuse; at the same time, it can complete parameter setting and smooth mode switching of the three control modes of position, speed and torque.
2. Real-time status monitoring: The motor position, speed, torque, current and other data can be viewed in real time. The absolute encoder data and motor revolutions can also be displayed to facilitate verification of the position difference between the motor and the actual device. System configuration information such as driver and motor models can also be visually viewed.
3. Automatic tuning and performance optimization: With the help of the servo assistance function of the software, you can complete the tuning of the servo system during the startup phase by following the prompts, match the load characteristics, optimize the smoothness of equipment operation, reduce vibration, and improve control accuracy.
4. Fault diagnosis and traceability: The three-digit alarm code of the drive will be displayed to quickly locate the cause of the fault; the drive recorder data can also be read to view 16 types of alarm-related waveforms and monitoring values ​​such as motor current and position instructions before and after the fault to help analyze the cause of the fault; if the motor does not rotate, the cause of the fault can also be obtained from the drive.