Configuration - Drive
9-101
9
iControl DC
Speed Reference More detailed settings related to the speed reference mechanism.
Please refer to “Calibrating Actual Car Speed (System 12 SCR Drive)” on page 2-62.
• Reference type: Tachometer, Encoder, Internal or Serial.
• Resolution: This parameter affects elevator speed only for an encoder configuration.
Increasing this parameter will increase car speed.
• Rotational coupling ratio: This parameter affects elevator speed only for an encoder con-
figuration. Increasing this parameter will increase car speed. If the encoder is shaft
mounted, this is normally set to 1. If the encoder is sheave or brake drum mounted, this
value must be calculated:
• Rated motor RPM: This parameter affects elevator speed for an encoder or serial configu-
ration. Increasing this parameter will increase car speed.
• Rotational direction: Sets the encoder pulse stream order recognized by the controller as
indicating up or down travel. This parameter is used by all configurations except Internal.
• Scaling: This parameter affects elevator speed only for a tachometer configuration.
Increasing this parameter will reduce car speed.
• Current safety calibration: This is a duplicate of the Current safety calibration parameter
on the Drive > Safety tab. Please refer to “Speed Reference” on page 9-102.
• Voltage safety calibration: This is a duplicate of the Voltage safety calibration parameter
on the Drive > Safety tab. Please refer to “Speed Reference” on page 9-102.
System
• Rated line voltage: Line voltage being supplied to the drive.
• Drive header voltage: Header voltage from -SCR page of job prints. Set Rated armature
voltage equal to the SCR drive header voltage. Please refer to “Current Limit Adjustments
(System 12 SCR Drive)” on page 2-63.
• Drive header current: Header current from -SCR page of job prints. Please refer to “Cur-
rent Limit Adjustments (System 12 SCR Drive)” on page 2-63. Set Rated armature current
equal to the SCR drive header current. Please refer to “Final Adjustment Before Running
at Contract Speed” on page 4-7.
• Normal rate limited stop: Determines the deceleration from leveling/releveling to zero
speed when the elevator stops normally at a floor. Please refer to “Final Adjustment Before
Running at Contract Speed” on page 4-7.
• Emergency rate limited stop: Determines the deceleration from this speed at this instant
to zero speed when the elevator makes an emergency stop.
Motor Rated RPM x Sheave (Brake) Diameter
Encoder Follower Wheel Diameter
Coupling Rotational Ratio =
OR
Motor Rated RPM x Sheave (Brake) Diameter
Coupling Rotational Ratio =
Brake Drum Circumference
Encoder Follower Wheel Circumference
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