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i750

The i750 cabinet servo inverter provides everything for precise and dynamic motion control in complex multi-axis applications. Advanced safety functions and One Cable Technology reduce wiring and control complexity. Intelligent data-based functions and IIoT enable innovative motion control concepts.
As a single or double axis, the i750 cabinet with a matching supplier fits seamlessly into the Lenze automation system. The strengths of the inverter become apparent in numerous applications in combination with Lenze controllers and the FAST Application Software Toolbox. The scalable range of hardware, software, engineering services, and digital services supports the realization of integrated automation systems from the cloud to the drive shaft.
As a power extension of the i750 cabinet servo inverter in the range of 22 ... 110 kW, the i950 cabinet servo inverter can be used.

Highlights

  • Integrated DC-bus connection
  • Small overall width from 50 mm for the double axis
  • Axis modules capable of multiple overloads for peak output currents between 5 and 64 A, double axes up to 32 A
  • Integrated Functional Safety and One Cable Technology (OCT)
  • Autotuning function for quick and easy controller adjustment
Title File Document type Version
Brochure i750 cabinet servo inverter Brochure 07/2025
Flyer i750 cabinet servo inverter EN Flyer 03/2023
Fault ID: 9090
Hex: 0x2382
Description: Fault - Device utilization (ixt) too high
Keypad display: Ixt error
Cause Remedy Severity/response

Device utilisation (ixt) too high by frequent and too long acceleration processes.

Check drive sizing. 

  • Reduce the maximum current of the inverter 0x6073 (P324.00). 
  • In case of high mass inertias, reduce maximum current of the inverter 0x6073 (P324.00) to 150 %.

Fault (configurable)

  • The event can only be reset after a blocking time.

Blocking time: 2 s

Setting parameters: 0x2D40:005 (P135.05)
Fault ID: 9040
Hex: 0x2350
Description: CiA: i²xt overload (thermal state)
Keypad display: i2t motor
Cause Remedy Severity/response

Motor thermally overloaded, e. g. by an impermissible continuous current or by frequent or too long acceleration processes.

Check drive sizing.

  • Check machine/driven mechanics for excessive load.
  • Check settings of the motor data.
  • Reduce values for slip compensation 0x2B09:001 (P315.01), 0x2B09:002 (P315.02) and oscillation damping 0x2B0A:001 (P318.01), 0x2B0A:002 (P318.02).

Fault (configurable)

  • The event can only be reset after a blocking time.

Blocking time: 2 s

Setting parameters: 0x2D4B:003 (P308.03)
Fault ID: 9024
Hex: 0x2340
Description: Short circuit at the motor end
Keypad display: Motor shorted
Cause Remedy Severity/response

Short circuit of motor cable

Check motor cable for short circuit.

Fault

  • The inverter is disabled immediately. The motor has no torque (is coasting).
  • The event can only be reset after a blocking time.

Blocking time: 2 s
Fault ID: 8992
Hex: 0x2320
Description: Short circuit or earth leakage at the motor end
Keypad display: Earth leak
Cause Remedy Severity/response
  • Short circuit/earth fault of motor cable
  • Capacitive charging current of the motor cable too high.
  • Check motor cable.
  • Check length of the motor cable.
  • Use shorter or lower-capacitance motor cable.

Fault

  • The inverter is disabled immediately. The motor has no torque (is coasting).
  • The event can only be reset after a blocking time.

Blocking time: 2 s
Fault ID: 8784
Hex: 0x2250
Description: CiA: Continuous over current (internal)
Keypad display: PU over current
Cause Remedy Severity/response
  • Continuous overcurrent on the inverter/ motor side.
  • Overcurrent at the brake chopper (brake transistor).
  • DC bus relay has not been closed due to a malfunction.
  • Check motor and wiring for short circuits.
  • Check brake resistor and wiring.
  • Check motor switching.
  • Check settings of the motor data.

Fault

  • The inverter is disabled immediately. The motor has no torque (is coasting).
  • The event can only be reset after a blocking time.

Blocking time: 2 s
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