There are two control modes, namely EtherCat and Pulse

At present,there is 1 series, which is: the economical MD-730 series

The MD-730 series currently covers EtherCAT and pulse control

 

The MD-730 series currently features a 17-bit multi-turn magnetic encoder.

The speed loop bandwidth of the MD-730 series is 2KHz.

The drives are categorized by voltage and power rating as follows: Single-phase 220V: SIZE-A (0.1kW, 0.2kW), SIZE-B (0.75kW)

All pulse models feature analog I/O (12-bit resolution), featuring 2 channels of AI (Analog Input) and 1 channel of AO (Analog Output). The 2 AI channels include 1 voltage input (-10V ~ +10V) and 1 current input (4-20mA), while the 1 AO channel is voltage output (-10V ~ +10V)

Dynamic braking is a standard configuration for all series and can be turned off in the shutdown settings. 
Note: Currently, there are no models with optional STO available on the market

Pulse models and full-function N-bus models have full-closed loop and frequency division functions, but they cannot be used at the same time. Since the cable pins overlap, only one of the functions can be selected when in use

Divided by control mode: The pulse model MD-730P has 8 DI and 5 DO; the MD-730N has 5 DI and 3 DO.

1）N-bus models support 300 nodes with a distance of 120 meters, a synchronization error of 15 ns, a synchronization jitter of ±20 ns, and a synchronization cycle of 125 μs. The topology supports linear and ring connections.
2）Pulse models support parallel RS485 communication connections with a maximum of 128 stations, a baud rate of up to 115200 bps, and the topology supports linear, star, tree, and hybrid connections.

It is not a standard configuration. All drives with 400W and below do not have built-in braking resistors, while models with 750W and above are equipped with built-in braking resistors as standard.

It is not a standard configuration. Only the MD-780N series is fully equipped with fans, and the MD-730/MD-760/MD-770 series servos with specifications of 750W and below do not have built-in cooling fans.

Yes, you can check the last ten fault records. The function codes from the first to the tenth are: C1E00, C1E10 —— C1E90

Yes, the panel can quickly switch between the servo's current state and other monitoring items such as servo speed, torque current, load rate, and bus voltage. The operation method is: press the up and down keys in the 88RN state to cycle through the switches. For shortcut methods such as quick JOG and quick group number switching, please refer to the manual.

1) Compact installation: Supported for SIZE A and B models. The spacing between adjacent servo drives should be ≥1 mm, and derating to 75% is required.
2) Spaced installation: The spacing between adjacent servo drives should be ≥10 mm. Supported for all series of models.
3) Zero-spacing installation: Supported for SIZE C, D, and E models.

There are 7 control modes in total, which are Profile Position mode (PP), Profile Velocity mode (PV), Profile Torque mode (PT), Cyclic Synchronous Position mode (CSP), Cyclic Synchronous Velocity mode (CSV), Cyclic Synchronous Torque mode (CST), and Homing mode (HM)

No, they must follow the principle of "left in and right out", that is, CN3 is for input and CN4 is for output.

It is required that the distance between nodes is less than 100 meters.

It is required to use shielded Cat 5e or Category 6 and above network cables with electrical performance specifications

They support standard services including PDO and SDO. EtherCat servos allow users to independently assign PDO lists and define PDO mapping objects.

The default functions of DI1-DI5 are positive limit, negative limit, origin, probe 2, and probe 1. The default functions of DO1-DO3 are servo ready, fault output, and brake output. These default functions support user customization and the logic level is adjustable . It is recommended to use shielded twisted-pair cables as digital signal lines

They support speed-torque control mode and position control mode.

Yes, when performing RS485 communication, CN3 and CN4 have no distinction between input and output.

When reading and writing the servo address, the high 8 bits of the starting address of the register are the group number, and the low 8 bits are the offset within the group. For example, for parameter C11.12, 11 is the group number, that is, DATA[0] = 0x11, and 12 is the offset within the group, that is, DATA[1] = 0x12

Please note that the reference grounds of all node 485 signals should be connected together, and a maximum of 128 nodes can be connected. Also, a termination resistor must be installed at the end station

It supports two methods: differential and open collector. High-speed differential supports a frequency of 4M with a minimum pulse width of 0.125μm; low-speed differential supports 500K with a minimum pulse width of 1μm; open collector supports a rate of 200K with a minimum pulse width of 2.5μm. It should also be noted that the internal power supply and external power supply are prohibited from being shared. Please strictly follow the wiring diagram in the manual for wiring; otherwise, it may cause signal errors and equipment damage

I/O signals support customization; it is recommended that shielded twisted-pair cables be used for digital signal lines, and separate shielded wires be used for different analog signals

The steps are as follows: 1. Pre-operation inspection 2. Power on 3. Jog operation 4. Servo adjustment and operation 5. Servo stop

1. Inspection of the drive's peripheral circuits, such as STO, network port sequence, connection of motor encoder and power lines, grounding, I/O signals, drive incoming line circuits, brake wiring, and unrelated exposed wire ends;
2. Mechanical inspection, such as whether there will be interference during the stroke, coupling locking, debris, metal chips, and whether the machinery is deformed, etc.

The main thing is that the power supply voltage level must not be incorrect, otherwise there is a risk of the machine exploding. The main control power supply must not be missed. Please refer to the manual for the specific wiring diagram

For the first jog, please use the panel or the servo software. Jogging can determine whether the servo can move normally and whether the mechanical connection is normal. For panel jogging, you can use shortcut keys or parameter F30.01. For specific operations, please refer to the manual

The definition of DI/DO should match the CN1 wiring, and the encoder type should be set. Secondly, for general applications, only inertia identification, rigidity level setting, and resonance suppression are needed. For higher requirements, advanced gain adjustment is required

Yes
1)Write 6091.1
2)Read 6091.1

In occasions requiring high response and high precision, the ratio is preferably less than 5 times, and at most up to 10 times. For occasions with certain requirements on precision and dynamic response, the ratio should be between 10-30 times. A ratio exceeding 30 times is only suitable for low-requirement point-to-point control and some rotating motion mechanisms. For situations with high requirements on positioning accuracy or response, the ratio should be within 2 times. For lead screw or coupling direct connection (with good connection rigidity and high precision requirements), the ratio should be within 5 times. For rack and pinion (with not very high connection rigidity and not very high precision requirements), the ratio should be within 10 times. A larger load inertia ratio will result in slower response and may easily cause control divergence and resonance.

Rigidity reflects the servo's ability to resist interference and follow commands. The higher the gain, the higher the rigidity, but it also reduces the stability margin of the servo system. For large machinery, the rigidity level is 8-12; for belt/gear-type loads, it is 12-15; for lead screw/direct connection-type loads, it is 16-20. (Excessively high rigidity may cause mechanical resonance and control instability!

In this case, standard parameters may no longer be sufficient. It may be necessary to adjust and add advanced parameters such as feedforward, command filtering, and PDFF, or even change the position loop and speed loop parameters in manual mode. For specific functions and adjustments, please refer to the corresponding part of manual

For bus servos, the host controller needs to import the corresponding description files (XML or GSD files). The EtherCAT master station must correctly configure PDO and axis mapping configuration, and the PN models must correctly configure messages and axis settings to ensure proper bus control

If the shaft jitters severely and oscillates back and forth, it is necessary to: a) Identify the inertia through F30.10. If the identified result is < 20, no operation is needed; if the identified result is > 20, try to directly set c00.06 (load inertia ratio) to 20 manually. And reduce the rigidity (for example, set c00.05 to 10). If the jitter still occurs, it is necessary to check whether there is a mechanical fault.

If the shaft emits a very loud screeching noise during operation or when stopping, it is necessary to:
a) Confirm whether inertia identification has been performed (to ensure response and accuracy, the recommended inertia design for the lead screw is below 5 times);
b) Confirm whether the rigidity exceeds the limit of the existing system, and reduce the rigidity appropriately;
c) Confirm whether it is resonance. Turn on the adaptive notch filter ( *set C01.30 = 2*). Manual setting is required if the effect is poor or there are many resonance points.

First, confirm whether the cable is equipped with a battery box. Secondly, changing to absolute mode will cause the servo to alarm Er20.8 (which appears when setting absolute mode for the first time). You can set F31.10 = 4 (to reset encoder faults and clear encoder data), and then the servo will alarm Alf1.0. Afterwards, perform a software reset (write 1 to F31.01) or power off and restart.

1) Grounding: Ensure proper on-site grounding. The driver, cabinet must be grounded. The diameter of the grounding wire should not be too small, and there should be no paint, etc., at the grounding position of the cabinet.
2) Install ferrite cores on power, encoder, and Ethernet cables (drive side) by looping each cable 3-5 times. Important: Never include the PE (ground) wire when applying ferrite cores.
3) Disabling Carrier Frequency Switching: Entering password C00-31=1107, then set R22-38 to 0. A power cycle is required for this change to take effect.
4) Adjusting Packet Loss Threshold: After entering password C00-31=1107, modify R20-2C to 80. The system must be power cycled to implement this adjustment.
5) Encoder Baud Rate Modification: Change the encoder communication rate to 2.5Mbps. This modification requires corresponding firmware updates to function properly.
Note:When servo operating near high-frequency devices like linear drives or maglev motors, ferrite cores become mandatory to prevent electromagnetic interference with your equipment.

1) Check whether the welding of pin DO3 of CN1 is normal and whether the positive and negative poles of DO3 are reversed; reversal will burn out the port DO3.
2) Check whether the brake relay is normally controlled and whether the device is in normal condition.
3) The brake parameter R20-48 is set incorrectly; it should be 1 but is actually 0.
4) Abnormal damage to the motor brake, etc.

1) Encoder or power cable misconnection (e.g., Encoder A cable connected to B )
2) Wire according to the correct UVW phase sequence.
3) At power-on, interference signals cause errors in the detection of the initial phase of the motor rotor. The UVW phase sequence is correct, but enabling the servo driver immediately triggers Er06.0; power off and restart.
4) Wrong encoder model; confirm the motor model and encoder type.
5) Incorrect encoder wiring, aging or corrosion, or loose encoder plug.
6) Under vertical axis working conditions, if the gravity load is too large, reduce the vertical axis load, increase rigidity, or shield the fault without affecting safety and usability.
7) Unreasonable parameter settings lead to excessive vibration during servo operation.
8) The motor is dragged in reverse by external force. If it can run normally and there is indeed an application condition where it is dragged in reverse by external force, consider shielding the runaway protection (C06.20=0, which should be set with caution)

Switching modes by writing a value to 6060h via SDO may cause the EEPROM address of 6060h to be erased and written more than 1 million times after 1-2 years of use, thereby triggering the servo alarm Er03.2.
1) Change 6060h by means of PDO writing to realize mode switching;
2) Or set parameter C13.10 to 0 (in this case, writing objects via SDO will not save to EEPROM)

1) Check whether the encoder cable is connected, whether it is plugged in and tightened properly, whether the aviation plug is tightened and fully inserted; check if there is an adapter, or if the encoder cable is connected after powering on first
2) Verify if parameter R20-00 is set to 10000 (password required for access).
3) Inspect the encoder connector for foreign objects or bent/broken pins.
4) Check if the drive port is loose to rule out pin disconnection.
5) Perform cross-testing by swapping drives, motors, and cables to isolate the faulty component. (Based on experience, motor issues are most common, while cable problems are least frequent.)

1) Check brake motors, if the brake is not opened or is worn out, troubleshoot according to the brake wear issue, including 24V wiring, DO3, etc.
2) Check if the UVW power lines are not plugged in/tightened properly, especially for high-power aviation plugs, which must be screwed to the bottom. For brake motors, confirm whether there is a 24V wiring pin inside the aviation plug.
3) Check if structural components are stuck. You can first disconnect the load and check if the fault still occurs when the motor is running without load.
4) Excessive deviation of the encoder angle may also cause an overload alarm. If the wiring is confirmed to be correct, try performing angle identification.
5) Check if the motor is undersized; if the acceleration/deceleration time is too short/frequent; if the load inertia is too large, etc. (Refer to the User Manual).
6) Conduct cross-verification to locate the driver, motor, and cables, and determine if the motor is burned. A burning smell can be detected at close range. Generally, the three-phase resistance cannot be measured (due to extremely low resistance), which can only be used as a reference.

1) Check if the wrong power supply is connected, such as a 220V driver connected to 380V, or if the input power voltage is too high. Do not keep it powered on continuously, otherwise, the bus capacitor may explode; you can check the fault records.
2) Check the fault records to see if ALF5.0 (brake resistor overload) is reported. If yes, you can modify the heat dissipation coefficient C00-13. The default value is 30, and it can be adjusted to 50-70 (maximum) according to actual conditions for built-in resistors; if an external resistor is used, it can be set to a larger value as long as the resistor does not get too hot (excessively large values may burn the resistor).
3) Check if the acceleration/deceleration time is set too short. If so, connect an external discharge resistor; if an external discharge resistor is already used, modify the heat dissipation coefficient C00-13 as mentioned above.
4) Check if the external discharge resistor wires are properly connected and if the shorting piece between P and D is removed.
5) For high-power servos, jogging via the panel at a speed of over 1000 rpm may easily trigger an overvoltage alarm because the default acceleration/deceleration time for panel jogging is 100ms. When jogging, do not set the speed too high, or use the background for jogging where the acceleration/deceleration time can be adjusted.
6) If the load inertia is large, reduce the acceleration/deceleration within the range that meets the application requirements.
7) Adjust the gain.