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i950

Servo drives i950 are designed for a power range of 22 – 110 kW, extending the i750 series within the Lenze automation system. Integration into modular machine applications is achieved through ready-made technology applications (parameterization instead of programming).
The architecture is unified for both centralized and decentralized motion control, enabling reuse of the same application software across different system configurations. Software modules are modular and expandable.

Key features

  • Prepared technology applications: table positioning, electronic gearbox, winder
  • One Cable Technology (OCT)
  • Modular scalability of feedback system and bus connection
  • Auto-tuning function for fast and easy controller setup
  • Integrated safety technology up to SIL 3 / PL e Cat. 4
  • Compliance with Ecodesign directive requirements, standard EN IEC 61800-9-2
Documentation
Title Language Document type Version File
"Winder Tension" technology application DE Commissioning 10/2023
"Winder Tension" technology application EN Commissioning 10/2023
"Winder Dancer" technology application DE Commissioning 10/2023
"Winder Dancer" technology application EN Commissioning 10/2023
"Sync and Correction" technology application DE Commissioning 10/2023
"Sync and Correction" technology application EN Commissioning 10/2023
"Electronic Gearbox" technology application DE Commissioning 10/2023
"Electronic Gearbox" technology application EN Commissioning 10/2023
"Table Positioning" technology application DE Commissioning 10/2023
"Table Positioning" technology application EN Commissioning 10/2023
"Speed Control" technology application DE Commissioning 10/2023
"Speed Control" technology application EN Commissioning 10/2023
CiA 402 advanced technology application DE Commissioning 10/2023
CiA 402 advanced technology application EN Commissioning 10/2023
Commissioning i950 servo inverter DE Commissioning 11/2024
Commissioning i950 servo inverter EN Commissioning 11/2024
Table positioning i950 servo inverter DE Manuals 10/2025
Table positioning i950 servo inverter EN Manuals 10/2025
Functional safety i950 servo inverter DE Manuals 03/2025
Functional safety i950 servo inverter EN Manuals 03/2025
Cyber security i950 EN Manuals 4.0
Project planning i950 servo inverter DE Project planning 1/2026
Project planning i950 servo inverter EN Project planning 1/2026
Brochure i950 servo inverter accesories ZH Brochure 11/2022
Brochure i950 servo inverter accesories SK Brochure 11/2022
Brochure i950 servo inverter accesories RU Brochure 11/2022
Brochure i950 servo inverter accesories PT Brochure 11/2022
Brochure i950 servo inverter accesories PL Brochure 11/2022
Brochure i950 servo inverter accesories IT Brochure 11/2022
Brochure i950 servo inverter accesories HU Brochure 11/2022
Brochure i950 servo inverter accesories FR Brochure 11/2022
Brochure i950 servo inverter accesories ES Brochure 11/2022
Brochure i950 servo inverter accesories DE Brochure 02/2026
Brochure i950 servo inverter accesories CS Brochure 11/2022
Brochure i950 servo inverter accesories EN Brochure 02/2026
Flyer i950 cabinet servo inverter EN Flyer 05/2020
Brochure i950 cabinet servo inverter EN Brochure 07/2025
Engineering data
Title Fieldbus File type Version File
GSDML i950 V01.08.00.2770 PROFINET GSDML 01.08.00.2770
GSDML i950 V01.07.04.2313 PROFINET GSDML 01.07.04.2313
GSDML i950 V01.04.01.1471 PROFINET GSDML 01.04.01.1471
GSDML i950 V01.03.07.1252 PROFINET GSDML 01.03.07.1252
GSDML i950 V01.02.03.985 PROFINET GSDML 01.02.03.985
GSDML i950 V01.01.03.816 PROFINET GSDML 01.01.03.816
Error codes
Fault ID: 12816
Hex: 0x3210
Description: Fault - DC bus overvoltage
Keypad display: DC Bus OV
Cause Remedy Severity/response

DC-bus voltage has exceeded the error threshold for overvoltage due to a too high braking energy or a too high mains voltage. The error threshold (display in 0x2540:006 (P208.06) results from the setting of the rated mains voltage in 0x2540:001 (P208.01).

Reduce dynamic performance of the load profile.

Check mains voltage.

Check settings for brake energy
management.

0x2541:001 (P706.01) = [0]: Connect brake resistor to the power unit and activate the integrated brake chopper

Fault
Fault ID: 12672
Hex: 0x3180
Description: UPS operation active
Keypad display: UPS oper. active
Cause Remedy Severity/response

Operation on uninterrupted 1x230V current supply (UPS) has been activated: Only a reduced output current is provided.

Switch back to operation with regular mains voltage

Warning
Fault ID: 12576
Hex: 0x3120
Description: Mains phase fault 
Keypad display: Mains Phase fail
Cause Remedy Severity/response

Mains phase failure
  • Check wiring of the mains connection.
  • Check fuses.

Fault
Fault ID: 1030
Hex: 1030
Description: Undervoltage in the DC bus
Keypad display: LU
Cause Remedy Severity/response

DC bus voltage is lower than specified in C0173.
  • Check mains voltage
  • Check supply cable

cawc
Fault ID: 1020
Hex: 1020
Description: Overvoltage in DC bus
Keypad display: OU
Cause Remedy Severity/response

Braking energy is too high. (DC−bus voltage is higher than set in C0173.)
  • Use braking unit or regenerative module.
  • Check dimensioning of the brake resistance.
Fault ID: 0016
Hex: 0016
Description: I2xt overload
Keypad display: OC6
Cause Remedy Severity/response
  • Frequent and too long acceleration processes with motor overcurrent.
  • Permanent motor overload with Imotor >Irmotor

Check drive dimensioning.
Fault ID: x018
Hex: x018
Description: I2xt overload advance warning
Keypad display: OC8
Cause Remedy Severity/response
  • Frequent and too long acceleration processes with motor overcurrent.
  • Permanent motor overload with Imotor >Irmotor

Check drive dimensioning.
Fault ID: 0015
Hex: 0015
Description: I x t overload
Keypad display: OC5
Cause Remedy Severity/response
  • Frequent and too long acceleration with overcurrent
  • Continuous overload with Imotor > 1.05 x Irx

Check drive dimensioning.
Fault ID: 0012
Hex: 0012
Description: Motor cable earth fault
Keypad display: OC2
Cause Remedy Severity/response

One of the motor phases has
earth contact.
  • Search for cause of short circuit.
  • Check motor cable.
Fault ID: 0011
Hex: 0011
Description: Short circuit of motor cable
Keypad display: OC1
Cause Remedy Severity/response

Short circuit

Excessive capacitive charging
current in the motor cable.
  • Search for cause of short circuit.

  • Check motor cable.

    Use motor cable which is shorter
    or of lower capacitance.
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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