OVF20
Guide Lines
Copyright 1996, OTIS GmbH Berlin. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of OTIS GmbH.
Authorization Date D1: 12-Jun-1996 Running on PCB: GBA 26800 H Software Version: GAA 30158 AAD Document Revision:
Date Author Page Comment
16-Feb-1996 G. Priebe 1 - 18 Original Document 28-Aug-1996 G. Priebe 1 - 21 replace
Table of Contents
1 Overview and Characteristics... 4
1.1 General 4 1.2 Characteristics ... 4 1.3 Limits of Application ... 4 1.3.1 Velocities... 4 1.3.2 Duties 5 1.3.3 Rated Currents... 5 1.3.4 Floor Distances ... 5 1.3.5 Suitable Motors ... 5 1.4 Thermal Overload ... 6 1.5 Learn Run ... 6 1.6 Load Weighing ... 6
2 Equipment ... 6
2.1 Power Supply... 62.2 Current Harmonic Filter (CHF) ... 6
2.3 Overload and Short circuit protection... 7
2.4 Short to Earth... 7
2.5 Hoistway Equipment and Position Reference ... 7
2.6 Control 7 2.7 Machine/Motor/Encoder ... 8
2.8 Inverter 11 2.8.1 Braking Resistors ... 11
2.8.2 MCB II (Motion Control Board) ... 11
2.8.3 Signal Flow and Interface... 12
2.8.4 List of Motion Commands ... 13
2.8.5 MCB II 24V outputs ... 13
3 The Control Principle ... 14
4 Speed Profile... 15
4.1 Generating of Speed Profile... 15
4.2 Speed Profiles... 16
4.2.1 Normal Run (FR)... 16
4.2.2 Short Landing (RR) ... 17
4.2.3 Inspection Run (IN) ... 18
4.2.5 Rescue Run (RS) (only MCS220 controller) ... 20
5 Sequence of operation during Start and Stop ... 21
5.1 Start Phase ... 21
1 Overview and Characteristics
1.1 General
The OVF20 (OTIS Variable Frequence) package controls the speed of an asynchronous motor with PWM using a frequency inverter.
It ensures good riding comfort as well as high levelling accuracy (max. ± 5mm) under all load conditions. The speed profile values as acceleration, nominal speed, deceleration etc. are adjustable via Service Tool. With the Service Tool it is also possible to adjust further parameters as well as to get information about status, events and errors.
A speed feedback is always required i.e. operation without encoder is not possible.
The OVF20 is suited to upgrade existing one or two speed elevators as well as modernisa-tion of UMV and AC servo units.
The OVF20 package (part # GBA 21150 A-H) replaces the former LSVF-W package (part # GAA 21150 A-H). All LSVF-W functions are supported by OVF20.
1.2 Characteristics
The current motor is limited to the double of its nominal value during acceleration or decel-eration. For this reason the motor heating is reduced compared with traditional drives.
In connection with a corresponding control (MCS 220) relevelling (RLV) and advanced door opening (ADO) are possible.
Because of the construction of the inverter and by using of an APD filter the requirements of EN 55011, class B are observed.
An additional filter (APDL) is an option for further improvements
The package can be switched off with support of an internal relay (inverter relay) by using of MCS 220 controller. It has to be attended that the switching-off function is only activated at elevators with less than 50 runs per day.
1.3 Limits of Application
1.3.1 Velocities
- max. 1,0 m/s for New Equipment at all controllers and without learn run - max. 1,2 m/s for Modernisation at all controllers and without learn run - max. 1,6 m/s with MCS220- or MCS220M- controllers and with learn run
1.3.2 Duties Inverter power 3,3 kW 5 kW 9 kW 15 kW 1,60 m/s 630 kg 1000 kg 1,20 m/s 320 kg 480 kg 630 kg 1000 kg 1,00 m/s 320 kg 630 kg 1000 kg 1600 kg 0,80 m/s 320 kg 800 kg 1250 kg 1600 kg max. duty load 0,63 m/s 630 kg 900 kg 1600 kg 1600 kg 0,50 m/s 800 kg 1150 kg 1600 kg 1600 kg 0,40 m/s 900 kg 1350 kg 1600 kg 1600 kg 0,25 m/s 1250 kg 1600 kg 1600 kg 1600 kg 1.3.3 Rated Currents Inverter power 3,3 kW 5,0 kW 9,0 kW 15 kW Nominal voltage 220V 480V 220V 480V 220V 480V 220V 480V nominal output current 15 A 10 A 25 A 15 A 50 A 25 A - 45 A current at acceleration 30 A 20 A 50 A 30 A 100 A 50 A - 90 A rated current (continuous) 12 A 8 A 20 A 12 A 40 A 20 A - 36 A The nominal current of the motor may not exceed the nominal inverter current.
The time of acceleration phase may not exceed 3 seconds.
The nominal output current may not flow for more than 60 seconds.
1.3.4 Floor Distances
speed stopping
distance in m
Landing distance in m
without learn run with learn run Normal landing short landing
1,60 m/s 2,40 > 4,80 > 1,20 > 0,35 1,20 m/s 1,40 > 2,80 > 0,80 > 0,35 1,00 m/s 1,20 > 2,40 > 0,60 > 0,35 0,80 m/s 0,95 > 1,90 > 0,60 > 0,35 0,63 m/s 0,80 > 1,60 > 0,60 > 0,35 0,50 m/s 0,65 > 1,30 > 0,60 > 0,35 1.3.5 Suitable Motors
The OVF20 is qualified as drive control for a multitude of AC motors. A special overview for usable motors is in:
OTIS MODERNISATION PACKAGES CATALOGUE Berlin A MCS220 M (blue section), Part 4.
The motor rated voltage should be equal or up to 5% less than the line voltage, it may not be higher than the line voltage.
1.4 Thermal Overload
In case of thermal overload (80°C heat sink temperature) the elevator stops immediately during an inspection run and it stops at the next floor during a normal run. If the tempera-ture increases, the inverter switches off (85°C heat sink temperature).
If the dynamic brake resistor is thermally overloaded (e.g. because of a short circuit), then the elevator stops immediately and after 1 minute the inverter switches off.
1.5 Learn Run
At units with integrated MCS220 or MCS220M controllers (with LCB II) have to arrange a learn run before starting up. The software determines the landing distances during the learn run and calculates the deceleration points for normal runs. The MCB II generates IP signal-swhich are transmitted over the output P2.5 to the LCB II. In this case the position refer-ence signals IPU, IPD, SLU, SLD will not be connected. For all other controller, especially MCS220/M Stand alone or 2 cabinet, the position reference signals IPU, IPD, SLU, SLD have to used. A learn run is not possible here.
1.6 Load Weighing
All MCS220(M) controllers with learn run are prepared to use load weighing in order to op-timize the start jerk. Two discrete load switches can be connected to the MCB II inputs P4.5 and P4.6. The switches should be adjusted to 25% i.e. 65% of full load.
It is an option to use load weighing especially for problematical modernisiation units, but it is not generally required to use it.
2 Equipment
2.1 Power Supply
For 480V packages, the functionality in operation will be ensured from 380 to 480V ± 10% and will function with reduced performance in a range of ± 15%.
The same is valid for 220V-packages in a range of 220V to 230V ± 10% or ± 15%.
2.2 Current Harmonic Filter (CHF)
The „Current Harmonic Filter“ smoothes the line current and limits the 5. harmonic (250 Hz) to max. 30% of the value of fundamental oscillation (50 Hz) at nominal power. The CHF does not reduce the high frequency noises but with it the code is fulfilled in Germany (EVV requirements).
2.3 Overload and Short circuit protection
The overload circuit breaker (OCB) is necessary in order to protect the drive package. Se-lection of OCB is made according to the power classes. It is only an indirect motor protec-tion.
Power 3,3 kW 5 kW 9 kW 15 kW
IOCB (400V) 6,3A - 10A 10A - 16A 16A - 25A 25A - 40A
IOCB (220V) 10A - 16A 16A - 25A 32A - 50A
The overload protection of the motor is realized in two ways: 1. Current limitation of the output current of the inverter 2. Temperature sensor in motor winding
2.4 Short to Earth
A fault current protection switch (FI) offers no protection for a short to earth behind the rec-tifier against dangerous contact currents.
In case the customer demands a fault current protection switch then use:
• an fault current protection switch with a selective circuit breaker at a nominal current of more or equal to 100 mA (e.g. ABB Stotz F 394-40/01) or
• an error current switch without a selective circiut breaker should be installed outside the current path of the inverter
2.5 Hoistway Equipment and Position Reference
The configuration of magnets and switches corresponds a normal 2 speed installation to recognize points of deceleration and stop points.
For short landings without learn run SLU/SLD-signals are required.
At OTIS 2000 controllers 5LS- and 6LS-switches at with learn run IPU and IPD switches are no longer used.
2.6 Control
The drive is available with MCS220 or MCS220M controller (integrated version, 2 cabinet or Stand Alone). It is also possible to connect OVF20 (Stand Alone) with MS300 or MCS310 controller.
Depending on the controller type, the drive interface to the OCSS is a standard interface (MS300, MCS310) or a coded interface (MCS220, MCS220M).
2.7 Encoder
The drive package OVF20 is designed to work with various speed encoders. The following table shows the availabe inputs:
MCB II Input / Output:
Connector / Pin Name Description
P5.1 SCLK1 Single Channel Input 1
Internal resistance: 1.8kΩ (with1kΩ resistor in series) P5.2 SCLK2 Single Channel Input 2
Internal resistance: 0.8kΩ P5.3 CLKA Two Channel Input A
Internal resistance: 1.6kΩ P5.4 CLKB Two Channel Input B
Internal resistance: 1.6kΩ P5.5 EGND Ground
P5.6 +15V 15V power supply output; tolerance ±0.75V; maximal output current: 100mA
P9.1 ESCR Screen
The SCLK-Inputs can be used for encoders with 1-channel and maximum 200 pulses. CLKA and CKLB can be used for encoders with 2-channels and maximum 2 x 1024 pulses. A 2-channel speed encoder with 2 x 1024 pulses is required for a nominal speed above 1.2 m/s.
In the case of non authorised encoders with shielded wiring, the shield has to be connected on both ends, that means connected to the appropriate contact on the MCB II and the mo-tor at PE.
2.7.1 Connection of the Speed Encoder
The following points should be noted when connecting the speed encoder: - A) Power supply for the speed encoder.
The OVF20 provides a 15VDC voltage for the encoder’s power: Connector pin P5.6 E15V : 15V for the speed encoder Connector pin P5.5 EGND : Earth for the speed encoder Maximum Power Requirement : 100 mA (0...70°C)
Screen Connection : provided that it is available, the screen
will be attached to the P9 (between P5 and P6) with a Fast-On connector (6.3 mm).
Caution!
The screen has to be connected to the OVF 20 package (P9) and to the motor.
- B) Single-Channel Speed Encoder
The various models should be connected as follows: Model 1:
Type of Speed Encoder : Output as Push-Pull Output stage Connector Pin P5.1 SCLK1 : Sinlge-channel Input 1
Internal Resistance SLCK1 : 1.8 KΩ Model 2:
Type of Speed Encoder : Ouput with 1.0 KΩ Pull-up i.e. GO 177 CK1
Connector Pin P5.2 SCLK2 : Single-channel Input 2 Internal Resistance SCLK2 : 0.8 KΩ
Model 3:
Type of Speed Encoder : Output with a Pull-up of >5.0 KΩ Connector Pin P5.1 SCLK1 : To be connected to the E 15 V Connector Pin P5.2 SCLK2 : Single-channel Input 2
Internal Resistance SCLK2 : 0.8 KΩ - C) Two-Channel Speed Encoder
Maximum Impulse / Resolution : 1024 Impulses per Channel The encoder should be connected as follows:
Model 1:
Type of Speed Encoder : Output as Push-Pull Output stage Connector Pin P5.3 CLKA : Channel A of the speed encoder Connector Pin P5.4 CLKB : Channel B of the speed encoder Internal Resistance CLKA: 1.6 KΩ
Internal Resistance CLKB: 1.6 KΩ
Other models of Two-channel Speed Encoders, such as encoders with Pull-up / Open-collector ouput stages, are not suitable.
- D) Authorised Speed Encoders
One channel speed encoder: GO 177 CK1 (maximum speed 1.2 m/s) Two channel speed encoder: GBA 633 A1 (maximum speed 1.2 m/s) Two channel speed encoder: JAA 00633 AAF 002 (required for v > 1.2m/s)
Example of speed encoder connection: GO 177 CK1 Connection on Impulse sensor Connector number Connection on the MCB II 15 V 1 P5. 6 VA 3 P5. 2 0 V 2 P5. 5
2.7.2 Encoder Timing Requirements
ton toff tperiod VIH VIL ton toff VIH VIL tphase
2.8 Motor
As motor cable basically a shielded cable has to used and the shield has to be connected on both sides. Therefore an unshielded cable has to be placed in an metal tube which has to be connected also on both sides. In this case no further cable especially an encoder ca-ble must be placed in the same tube. In addition the encoder caca-ble must not laid parallel to the motor cable.
2.9 Electro-Magnetic Compatibility (EMC)
The OVF20 package with built in APD- filter fullfilled the requirements of the european norm EN 55011. To avoid effect to other components the motor cable has to be shielded, either by an accordingly protection pipe or by using of shielded cable.
Take care that:
the shield has to be connected on both sides
the ends of the conductors have to be as short as possible using of shielded cable for encoder cable if possible
do not lay parallel encoder cable and motor cable
2.10 Inverter
The inverter contains the following components: 1. Power part: power filter
inverter
DC-link with condenser
transistor inverted rectifier with 16 kHz clock frequency 2. control part: driver for transistors (PDB)
pulse width modulator (MCB II) control
The PDB delivers also the power supply for the MCB II.
The 5-, 9- and 15kW- inverters have a fan which will switched on in dependence to heat sink temperature.
2.10.1 Braking Resistors
The braking resistors for generatoric operation are placed in a seperate box on top of the controller cabinet. A thermal contact controls them.
inverter power 3,3 kW 5 kW 9 kW 15 kW
voltage 220V 480V 220V 480V 220V 480V 220V 480V
resistance power 1,6 kW 2,4 kW 4,8 kW 6,0 kW
value of resistance 28 Ohm 78 Ohm 18 Ohm 54 Ohm 10 Ohm 24 Ohm 6 Ohm 24 Ohm
Please find a spare part list for resistors in Service-Handling No.: 0 2-4 chapter 4.
2.10.2 MCB II (Motion Control Board)
The MCB II contains following parts:
• 16 bit microprozessor 80196
• 32 kByte RAM, 128 kByte EPROM, 8 kByte EEPROM
• digital 24/30V-interface to OCSS and to position signals
• 110V-interface to safety circuit
• interface for the encoder, including a 15V-power supply
• RS422-interface to Service Tool
• analog output for measurements with oscilloscope
The MCB II generates a speed profile to realize the speed curve which pretend by pa-rameters given in via Service Tool.
2.10.3 Signal Flow and Interface 110 Vac Inputs 110 Vac Outputs Safety -Chain Main Switch 24 Vdc Inputs Encoder -Interface 24 Vdc Outputs 110 Vac Inputs Operation Control Safety Function Load Weighing Device Profil-Selection Position Ref. Operational -Control Brake Power Supply Hoistway -Signals Speed -Encoder
UIB - up inspection button DIB - down inspection button
NOR - normal run
SW
V1 - speed command 1 V2 - speed command 2 V3 - speed command 3 V4 - speed command 4
DBD - drive and brake switched off
** LW1 / LW2 - load weighing information
1LV / 2LV - doorzone switches 1LS / 2LS - deceleration switches
*SLU/SLD short landing switches * IPU / IPD - pulse up/down ** UIS / DIS - releveling signals
15 V extern
SCLK1 / SCLK2 - slow clock CLKA / CLKB - fast clock
BY - brake relay DS 1 - drive state 1 DS2 - drive state 2 DS3 - drive state 3 DS4 - drive state 4 DS5 - drive state 5
PON - Voltage on / off
110 VAC for charge and inverter relay
2.10.4 List of Motion Commands
MS300 and MCS310 (uncoded interface)
There are four speed commands: U = Up
D = Down T = Normal run
G = Inspection run or short landing in dependence of UIB DIB or NOR
MCS220/M (coded interface)
v4 v3 v2 v1 MC meaning
0 0 0 0 <WT> drive is waiting for next run 1 1 1 1 <ST> stop, run finished
0 0 0 1 <UNVALID> not allowed (Hardware on LCB II) 1 1 1 0 <SD> stop in next landing
0 0 1 0 <OP UP> unused 0 0 1 1 <OP DN> unused
0 1 0 0 <IN UP> inspection run up 0 1 0 1 <IN DN> inspection run down 0 1 1 0 <FR UP> fast run up, normal run 0 1 1 1 <FR DN> fast run down, normal run 1 0 0 0 <RS UP> rescue run up
1 0 0 1 <RS DN> rescue run down 1 0 1 0 <RL UP> relevelling up 1 0 1 1 <RL DN> relevelling down
1 1 0 0 <RR UP> short landing distance up 1 1 0 1 <RR DN> short landing distance down
2.10.5 MCB II 24V outputs MCB II MS300 MCS310 BY (P3.4) DS1 (P2.1) DS1 = OP* DS1 = OP* DS2 (P2.2) DS2 = DZ DS2 = DZ DS3 (P2.3) DS3 = SL** DS3 = SL*** DS4 (P2.4) DS4 = LNS DS4 = LNS DS5 (P2.5) DS5 = not used DS5 = IP * = OP-Relay in controller
** = one short landing *** = several short landings
MCB II MCS220 (LCB II) BY (P3.4) DS1 (P2.1) P1.1 ) DS2 (P2.2) P1.3 ) coded DS3 (P2.3) P1.5 ) DS4 (P2.4) not used
DS5 (P2.5) P1.9 and P1.10 IP signal in controllers with learn run
output old signals meaning
DS1 DS2 DS3 DR RUN SC LNS
0 0 0 0 x x x drive not ready
1 0 0 1 1 0 1 elevator running, Speed > Limit, LNS active 0 1 0 1 1 0 0 elevator running, Speed > Limit
1 1 0 x x x x drive not ready 0 0 1 x x x x learn run is active
1 0 1 1 1 1 1 elevator running, LNS active 0 1 1 1 1 1 0 elevator running
1 1 1 1 0 1 0 drive is ready, elevator standing
3 The Control Principle
Gear Car MCB II Speed-encoder Braking resistance Control MCS220 MCS310 MS300 v1 - v4
UIB, DIB, NOR
DS1 - DS5 U1, F1 L1 L2 L3 Iu, Iv Hoistway signals U1 F1 Speed-feedback Inverter Motor
The rectifier converts the three phase power supply into a direct voltage which will flattened by means of capacitors in DC-link. Then this direct voltage will converted in an alternating voltage with variable frequency and voltage by means of puls width modulation.
The output frequency (F1) and voltage (U1) are determined by the MCB II from reference speed, measured speed and measured motor current. The reference speed (speed profile) is generated depending on control- and hoistway signals. For speed measurement an en-coder is required.
Furthermore the control is constructed in the way that the max. motor current can not over-ceed the inverter rated current.
If max. current (e.g. during the acceleration phase) is reached, then the acceleration rate is reduced. In this case the motor moves with a constant slip and torque. The acceleration rate which has been adjusted by the Service Tool is not reached.
4 Speed Profile
4.1 Generating of Speed Profile
The speed profile is determined by means of individual parameters and with the help of puls widht generator passed on.
To generate the stop control point, the profile generator needs either a hoistway signal or a internal deceleration signal. After perception of such a signal the speed is reduced to creep speed due to the adjusted values. After perception of an LV-signal the speed is decreased to 0 m/sec.
The parameters for influence of speed profile are (by means of SVT adjustable):
NOM SPE, CRE SPE, INS SPE, ACC, DEC, JERK, IPU DLY, IPD DLY, LV DLY UP and LV DLY DOWN.
With setting of CON SPE, which depends from the mechanic of installation, all further speed profile dependent parameters are software internally set.
4.2 Speed Profiles
4.2.1 Normal Run (FR)
Signal flow with learn run
Signal flow without learn run
T (SD)
IPU/IPD DLY LV DLY
IPU/IPD LV
Input signals during normal run:
NOR = high (MS/NE 300. MCS 310) UIB = DIB = high (all controllers)
U/D = high
T = high coded interface at MCS 220 (CONTR TYPE = 2 or 4) g = low t v WT FR SD ST WT V1-V4 1LV & 2LV IP RUN
4.2.2 Short Landing (RR)
Signal flow with learn run
The motion command REDUCED RUN (RR) is permanently active. The drive stops at the next floor. The IP signal is not used.
Signal flow without learn run
Inputs during short landing:
NOR = high (MS/NE 300, MCS 310) (UIB = DIB = high at all controllers)
U/D = high
G = high coded interface at MCS 220 (CONTR TYPE = 2 or 4) t = low SLU/SLD DLY SLU/SLD t v V1-V4 LV IP RUN WT RR ST WT
4.2.3 Inspection Run (IN)
Input signals during inspection run: UIB, DIB = high
U, D = high (only CONTR TYP = 1)
v1 - v4, coded interface at MCS220 (CONTR TYP = 2 or 4)
t v WT IN ST WT UIB/ DIB V1-V4 1LV & 2LV IP RUN
4.2.4 Releveling (RL) (only at MCS220 controllers)
Input signals during relevelling (only with MCS220, CONTR TYP = 2 or 4) UIB = DIB = high
v1 - v4 = coded interface at MCS220
Releveling is initialized by the LCB II. The drive receives start and stop commands. t v WT RL ST WT UIS & DIS V1-V4 1LV & 2LV IP RUN
4.2.5 Rescue Run (RS) (only MCS220 controller)
IPU/IPD DLY*
IPU/IPD * only required without learn run
In the case of elevator controling systems installed with an EPO box (Emergency Power Operation), the control system can be switched over to emergency power in the occasion of a power cut.
The LCB II, which looses the position of the elevator because of the power cut, then sends a message to the OVF20 drive, by means of the EPO box, giving the command to a „Res-cue Run“ in order to free the occupants of the elevator.
The drive will subsequently carry out a normal run until the elevator arrives at the next floor. If the elevator stops at the bottom- most limit switch 1LS, it will be accelerated in an up di-rection and the top-most limit switch 2LS will be accelerated in a down didi-rection.
t v WT RS ST WT V1-V4 1LV & 2LV IP RUN
5 Sequence of operation during Start and Stop
5.1 Start Phase
1. The main contactors are energized by MCB II (SW-Signal).
2. Premagnetization of motor. During this period the motor is premagnetisized by a voltage with constant amplitude and frequency before brake is lifted.
3. During lifting of brake the output frequency is increased by a constant slope.
4. The speed profile starts with adjusted values after the first valid speed encoder signal.
BY Premag Per Pret slope Brake SW RUN Pret Frequenz
5.2 Stop Phase
1. After reaching the stopping point LV and passing of LV DLY-time the speed will be re-duced to 0 m/s during the time RMP DWN T2.
2. During the EL HLT PER the motor is hold electrical. DRP BK DLY have to be adjusted in this way that the brake will active in this period.
3. During DE MAG PER the motor current decreases to zero. 4. With drop of the main contactor the run-signal will be inactiv.
5. By means of DZ- or RUN-signal the control will informed that run is finished.
DEMAG PER Creep Speed LV DLY LV BY RMP DWN T2 EL HLT PER Brake SW DZ RUN
