KEB F5 Elevator Driver Complete Guide

Sin/Cos (1Vpp): Suitable for Heidenhain ERN 1387, etc., requiring high-resolution interpolation (LE05 multiplier factor is usually set to 8).

Hiperface: 7.5V power supply, 1Vpp incremental signal+RS485 serial data. The maximum cable length is 35m (calculated based on voltage drop).

SSi: Same 1Vpp increment+RS485 serial data, supports binary or Gray code formats.

BiSS/EnDat 2.2: Pure serial high-speed communication, with a maximum clock frequency of 4.16MHz and a maximum cable length of 50m.

UVW: Hall type commutation signal, used for square wave encoders.

For permanent magnet synchronous motors (PM), the absolute position of the encoder (LE06) must be learned before the first operation: static polarity recognition (SPI, LL05) or encoder pole position learning with motion (LL06) can be used. SPI does not need to disconnect the traction wheel, but requires the brake to be reliably closed; LL06 is suitable for balancing elevator cars or empty traction wheels.

Encoder simulation output (X3B): The X3A encoder signal can be divided and output to external systems (such as group control cabinets) through TTL RS422. The maximum frequency is 200kHz, and the load current is limited by the total capacity (500mA for 5V and 170mA for 24V).

Core parameter configuration and debugging process

The parameter structure of the F5 driver is extremely clear, divided into groups such as US (basic settings), LI (input), LM (motor data), LE (encoder), LN (mechanical data), LS (speed curve), LL (self-tuning), LC (control settings), LT (timer), LO (output), FB (fieldbus), etc. The following introduces key parameters in debugging order.

Basic Settings (US):

US02: British/metric units (ft/min or m/s).

US03: Motor type (induction with gears/without gears, permanent magnet with gears/without gears).

US04: Control type (digital speed selection, binary speed selection, absolute/bipolar analog speed, serial DIN66019 service 49/50, serial binary, etc.). Elevator control cabinets usually use binary or digital speed selection (0 or 1), and can also use CANopen (CiA417).

US05: Load configuration. After changing US02, US03, and US04, it is necessary to perform 'Write configuration to drive', and the new configuration will overwrite the previous parameters.

US06: Contract speed. The internal overspeed limit is automatically set to 110% of the contracted speed.

Motor data (LM):

Induction motors require input of power (LM01), speed (LM02, note that it must be the rated speed with slip, asynchronous speed), current (LM03), frequency (LM04), voltage (LM05), and power factor (LM06).

Permanent magnet motors require inputs: speed (LM02), current (LM03), frequency (LM04), voltage (LM05, usually the effective value of the back electromotive force at rated speed), and torque (LM07). Must verify motor pole number: LM04 × 120/LM02=even integer (pole number). If not met, adjust LM02 or LM04.

LM08: Motor overload protection (must be turned on), overload curve complies with UL508C, trip for 2 minutes at 150% current.

Motor parameter self-tuning: LL01=Start. The brake needs to be turned off, the external speed command set to zero, and the maintenance operation button (speed+direction+enable) pressed. The process takes about 2-5 minutes, and high-frequency noise will be emitted.

Mechanical Data (LN):

LN01: Traction wheel diameter (inches or mm).

LN02: Reduction ratio (X:1), for machines with gears, the correct ratio must be inputted; Gearless is 1.

LN03: Rope winding ratio (1:1, 2:1, 4:1, etc.).

LN05: Estimated reduction ratio (if unknown, recommended value can be calculated based on rated speed, contract speed, etc.).

These parameters directly affect the conversion from ft/min to rpm inside the drive, and incorrect settings can cause elevator speed deviation or overspeed faults.

Speed Curve (LS):

LS01: Leveling speed (default upper limit of 25fpm, can be unlocked up to 59fpm).

LS02: High speed (maximum contracted speed).

LS03: Maintenance speed (≤ 150fpm).

LS04: Calibration speed (high leveling speed).

LS05~07: Intermediate speeds 1-3 (for different floor distances).

LS15~17: Preset speed curve (soft, medium, hard). Automatically fill in acceleration, deceleration, and acceleration values after selection. LS20~45 can also be manually adjusted.

Note: For serial or analog speed control modes, the driver itself does not generate a speed curve, but the external curve can be limited to the driver's set value through the LS15=internal curve option.

Gain Adjustment (LC):

LC01: Control mode. Recommendation: Closed loop FOC (2) is used for induction motors; The closed-loop synthesis pre torque (5) is used for permanent magnet motors and does not require a weighing device.

LC02: Speed gain optimization. If inertia learning (LL10) has been completed, the scaling/integration gain can be adjusted from 0 to 25.

LC03/LC04: Proportional gain (acceleration/deceleration phase), typical initial value of 3000.

LC08/LC09: Integral gain (acceleration/deceleration phase), typical initial value of 250.

LC11/LC12: Integral offset gain (low-speed acceleration/deceleration range). For permanent magnet gearless traction machines, LC11 may require up to 2000~5000 to suppress starting slip.