Emerson E300 Series - Floor Sensor Correction

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E300 Design Guide 179
Issue Number: 1
Figure 7-23 Peak curve operation timing
7.21 Floor sensor correction
Independent of the positioning profile selected (Direct to floor or Creep to floor), additional floor sensor correction can be implemented when
operating in RFC-A or RFC-S mode. This feature provides improved accuracy for the final positioning at the floor target position.
Floor sensor correction allows:
• Compensation for rope creep and hardware scaling errors.
• High levels of floor target position accuracy with elevator speeds in excess of 1m/s, utilising Direct to floor positioning control.
Floor sensor correction requires the following:
• A floor correction sensor e.g. door zone sensor, which is connected to the digital input 5 (control terminal 28) on the elevator drive. The sensor
should be placed at a fixed distance (between 50 mm to 500 mm) before each floor level. Alternatively, in Creep to floor operation, the creep
speed reference is deselected at a fixed distance (between 50 mm to 500 mm) before each floor level. Settings above 500 mm will reduce the
accuracy at the floor level.
The distance from the floor correction sensor to the floor level must be set in Floor Sensor Correction Target Distance (G31). It is assumed that the
distance to the floor level is symmetrical for travel upwards and downwards.
Table 7-37 Floor sensor correction distance parameters
Peak curve operation
Distance
Peak curve
distance
Nominal Spd
Enable Peak curve operation
Selected speed
Creep speed
Set point peak curve distance
Measured Peak curve distance
Calculated deceleration distance
Measured deceleration distance
Deceleration Distance Calculated ()J43
Deceleration Distance Measured ()J44
Peak Curve Enable ()G41
Peak Curve Setpoint Distance ()G43
Peak Curve Measured Distance ()G44
Parameter Details
Floor Sensor Correction Enable (H23) Enables the floor sensor correction function
Floor Sensor Correction Source Select (H24)
Selects whether floor sensor correction is triggered by de-selection of creep speed or by the
signal from the floor correction sensor.
Floor Sensor Correction Edge Detection (H25)
Selects whether a positive or negative edge of the signal from the floor correction sensor is
detected.
Floor Sensor Correction Target Distance (G31) Sets the floor sensor correction target distance in mm.
Speed At Floor Sensor Correction Active (J46) Indicates the sampled elevator speed at the moment floor sensor correction was activated.
Remaining Floor Sensor Correction Distance (J47) Indicates the remaining distance to floor level in mm when floor sensor correction is enabled.