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Closed-loop Start-up
18
Closed-loop Start-Up Procedure
The following is a recommended closed-loop
start-up procedure:
Encoder Set-up
1) Verify the incremental encoder option card
has been installed correctly. And the
encoder has been selected and installed in
accordance with the following:
Electrical interference and mechanical
speed modulations are common problems
that can result in improper speed feedback
getting to the drive. To help avoid these
common problems, the following electrical
and mechanical considerations are
suggested.
IMPORTANT
Proper encoder speed feedback is essential
for a drive to provide proper motor control.
Electrical Considerations
•
If possible, insulate both the encoder
case and shaft from the motor.
•
Use twisted pair cable with shield tied to
chassis ground at drive end
•
Use limited slew rate differential line
drivers.
•
Do not allow capacitors from internal
encoder electronics to case.
•
Do not exceed the operating
specification of the encoder/drive.
•
Use the proper encoder supply voltage
and use the highest possible voltage
available. (i.e. HPV 600 - 12VDC
preferred)
Mechanical Considerations
•
Use direct motor mounting without
couplings.
•
Use hub or hollow shaft encoder with
concentric motor stub shaft.
•
If possible, use a mechanical protective
cover for exposed encoders.
2) Enter / Verify the encoder pulses entered in
the ENCODER PULSES (A1) parameter
matches the encoder’s nameplate.
Motor Parameter Set-up
3) Select one of the two default motors (either
4 or 6 pole) for the MOTOR ID (A5)
parameter (or select a valid motor ID, if
available).
Enter / Verify the following from the motor’s
nameplate:
•
Motor HP or KW rating (RATED MTR
POWER(A5))
•
Motor Voltage (RATED MTR
VOLTS(A5))
•
Motor Excitation Frequency in Hz
(RATED EXCIT FREQ(A5))
•
Rated Motor current (RATED MOTOR
CURR(A5))
•
Number of Motor Poles (MOTOR
POLES(A5))
•
Rated Motor Speed at full load in RPM
(RATED MTR SPEED(A5))
Hoistway Parameter Set-up
4) Enter / Verify The hoistway parameters:
•
CONTRACT CAR SPD (A1) parameter
programs the elevator contract speed in
ft/min or m/s.
•
CONTRACT MTR SPD (A1) parameter
programs the motor speed at elevator
contract speed in RPM.
NOTE: The above two parameters create
the interaction that allow engineering units to
be used throughout the HPV 600 software.