Pitagora 4.0 – Car position reading system

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This counting system consists of two magnetic readers (FAI-FAS) with a normally open contact mounted on two brackets positioned on the top of cabin, and a set of magnets positioned on the elevator rails.
This counting system can be used when the system’s characteristics meet the following conditions:

1) Floor-to-floor distances of less than 0,4 meters (short floors)
2) Floor-to-floor distances greater than 1,8 meters
3) Speed < 0.8 m/s

Installation

Case A : Elevators with frame mechanics
Case B : Elevators with backpack mechanics

Accessories for special cases

Positioning magnets on elevator guides

C) Floors
D) Deceleration

Wirings

The Magnetic readers are connected directly to the TOC box (top of cabin)

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This counting system can only be used on systems with speeds below 2m/s and without open-door maneuvers; it is suitable only for the following optional boards for Gearless motors with closed-loop systems:

OPC-PR Q40.SCLSC – Encoder Sin Cos
OPC-PS Q40.SCLFL – Encoder En Dat
OPC-PSH Q40.SCLSCH – Encoder Sin Cos+Hiperface

The controller processes the signals transmitted by the OPC boards, converting the pulses into a count.
This counting system has an accuracy of approximately 1 millimeter.

For further information, see the “FLOOR SELF LEARNING PROCEDURE” section in the quick installation guide.

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The new DMG magnetic encoder uses a sensor to detect the rotation and position of a magnet placed on the encoder pulley axle. The pulses generated are received and processed by the lift control panel which calculates the position, direction and speed of the car.

Installation

Advice and warnings

The pulley embedding the Encoder must be installed in the top of the shaft or in the pit, close to the machine room.

System components

Case 1 : Elevators with frame mechanics
Case 2 : Elevators with backpack mechanics

A) – It is the Encoder pulley that contains the electronic card. It can have 2 resolutions:
– 1.25 mm (100 PPR) for the red labeled encoder: To be used with the Pitagora 4.0 controller starting from firmware version 3.0.2
– 2.5 mm (64 PPR) for the blue labeled encoder: To be used with the V3 / Musa / Pitagora 4.0 controllers up to Firmware Y version
C) – The spring tensioner can also be mounted on the top of cabin as needed.

Mounting

Mounting depends on the mechanics of the installation.

Case 1 – Elevators with frame mechanics

C) – The spring tensioner can also be mounted on the top of cabin as needed.

Remove the retainer only after the installation is complete.

In case of replacement on old systems, it will be necessary to untie the old rope and re-tension it after assembling the new encoder.

Case 2 – Elevators with backpack mechanics

C) – The spring tensioner can also be mounted on the top of cabin as needed.

Remove the retainer only after the installation is complete.

In case of replacement on old systems, it will be necessary to untie the old rope and re-tension it after assembling the new encoder.

Wirings

Connection to Pitagora 4.0 controller

– Starting from firmware version 3.0.2 –A) – Encoder with 1.25 mm resolution

– Up to firmware version 3.0.1 –A) – Encoder with 2.50 mm resolution

Connection to existing MUSA / PLAYBOARD V3 controllers

A) – Encoder with 2.50 mm resolution

You can replace the existing rope encoder with the new magnetic encoder (2,50 mm resolution).

 Just leave the existing cable (A) and connect it to the new encoder by means of an adapter cable (B).

After replacing the encoder, check:

• The correct direction of rotation in inspection mode (up movement, increase in mm, down movement, decrease in mm). If necessary, change the direction of rotation from the controller by following these instructions:
  1. Set the panel in Temporary operations (Configuration menu -> Temporary operations -> Yes);
  2. Change the rotation in the System Positioning menu -> Positioning System -> clockwise/counterclockwise encoder;
  3. Remove the Temporary operations  (Configuration menu -> Temporary operations -> No).
• Check the correct alignment of the car on all floors. If necessary, adjust the stopping accuracy from the controller in the System Positioning menu -> Floor position.
  

PIN OUT JST 7 poles connector

Diagnostics LED

POWER: If the LED is on, the encoder is powered.
A/B: Status of encoder outputs. With the lift car stationary there is no change in the status of these LEDs (they can be both ON and OFF); with the lift car in motion the LEDs will both be ON.

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The absolute encoder allows you to replace all the safety contacts inside the lift shaft. The position of the cabin is detected thanks to a magnetic strip.

Installation

Dimensions:

System components

Case 1 : Elevators with frame mechanics
Case 2 : Elevators with backpack mechanics
Case 3 : Ground and ceiling fixing

Mounting

Case 1 – Elevators with frame mechanics

Case 2 – Elevators with backpack mechanics

Case 3 – Ground and ceiling fixing

Correct positioning of the Magnetic Tape

Remove all the magnets in the compartment before installing the magnetic tape.

Do not install the magnetic tape near permanent magnet motors.
Do not use magnetized tools near the Magnetic tape.
Do not use welding equipment near the magnetic tape.
Respect the fitting shown on the tape and make sure it is in the correct position shown in the following figure:

A) – Tape touches the guide with the magnetized side.
B) – Tape touches the guide with the steel side.

LED Signal on the device

LED	DESCRIPTION
MODE	Normal mode	Slow Flashing (1 s)
	Pre-Commissioning Mode	Fast Flashing (0,1 s)
	Teach Mode	Lights permanently
ERROR	No Error	Led OFF
	Generic Error	Led ON
	Emergency Error	Flashing
TAPE	Magnetic Tape not detected	Led ON
eSGC	eSGC Contact close	Led ON
	eSGC Contact Open	Led OFF
OC	OC Contact close	Led ON
	OC Contact Open	Led OFF
SR1	SR1 Contact close	Led ON
	SR1 Contact Open	Led OFF
SR2	SR2 Contact close	Led ON
	SR2 Contact Open	Led OFF
CAN-ERR	Status CAN Open	Led ON
CAN-RUN	Status Can Open	Led OFF

Explanation of safety contacts

Reduced Head and/or Reduced PIT Installation		Sufficient Head and Pit clearance according EN81-20 §5.2.5.7 / § 5.2.5.8
	Normal Mode	A) -	TOP floor
	Inspection Mode	B) -	BOTTOM floor
	Safety contacts status	C1) -	Upper reference position
	Inspection UP button	C2) -	Lower reference position
	Inspection DOWN button	D1) -	Upper final limit switch
	Final limit switches Offset Up	D2) -	Lower final limit switch
	Final limit switches Offset Down	E1) -	Upper pre-triggered stopping system limit
	Inspection limit switches Offset Up	E2) -	Lower pre-triggered stopping system limit
	Inspection limit switches Offset Down	F1) -	Upper inspection limit switch
	Pre-Triggered Stopping System Offset Up	F2) -	Lower inspection limit switch
	Pre-Triggered Stopping System Offset Down

For manual adjustment of the positions of the indicated is possible from menu <Positioning> Monitor Encoder (see table below).

	Label	Page	Description
	N_LIM_S	7	Upper final limit switch offset (offset over top floor)
	N_LIM_D	7	Lower final limit switch offset (offset under bottom floor)
	I_LIM_S	6	Upper inspection limit switch (offset under top floor)
	I_LIM_D	6	Lower inspection limit switch (offset over bottom floor)
	TRIPS	8	Upper Pre-Triggered Stopping System limit (from Upper Reference Position)
	TRIPD	8	Lower Pre-Triggered Stopping System limit (from Lower Reference Position)

TRIPS and TRIPD values are used only if ELGO is part of Safety System for Reduced Head and/or Pit  (ELGO + eSGC).

Wirings

Connection to Pitagora 4.0 controller

The ELGO encoder is connected directly to the TOC box (top of cabin)

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