Leeson 174475, Инструкция по установке и эксплуатации, Страница: 62 / 80

33
SPEED DP
(SPEED DECIMAL POINT)
This parameter is used to move the decimal point location in the speed display. This parameter will not have
any effect if UNITS is set to HERTZ or % HZ. The possible settings are: XXXXX, XXX.X, XX.XX, X.XXX,
and .XXXX. Refer to Parameter 32 - HZ MULT above for an example on the use of SPEED DP.
34
LOAD MLT
(LOAD MULTIPLIER)
This parameter is used to scale the load display. If the drive output current rating is higher than the motor
full load current rating, the drive will not display 100 % load when the motor is at full load. Setting this
parameter to the ratio (in percentage) of the drive output current rating to the motor full load current
rating will scale the load display to show the motor load instead of the drive load. This will result in a
display of 100% when the motor is at full load.
The motor overload circuitry is also affected by this parameter. When the display reads 150% load, the drive
will trip on OVERLOAD in one minute, regardless of the actual motor current. If this parameter is used to
scale the display to show actual motor load, then parameter 17 - MOTOR OL should be left at 100%.
Likewise, if MOTOR OL has been set according to the motor full load rating, this parameter should be left
at 100%. Changing both parameters will result in an OVERLOAD fault sooner than expected.
The output signal at TB-10B is also affected by this parameter. When set to the ratio of current ratings as
explained above, the output signal will be proportional to motor load instead of drive load.
35
CONTRAST
(LCD DISPLAY CONTRAST)
This parameter is used to adjust the contrast of the drive display and can be set to LOW, MED, or HIGH
in order to obtain the most visible display. If the drive is mounted lower than eye level, a HIGH setting may
make the display more visible. Likewise, if the drive is mounted higher than eye level, a LOW setting may
make the display more visible.
36
SLEEP TH
(SLEEP THRESHOLD)
The MC1000 Series drive has a Sleep Mode function that allows the drive to cease operation when system
demand falls below a preset level. This is to prevent the motor from operating at low speeds for long
periods of time. It is commonly used along with the PID Setpoint Control feature, but can also be used in
standard speed control mode.
When the commanded speed falls below the SLEEP THRESHOLD setting for the defined SLEEP DELAY
time (see Parameter 37 below), the drive will “go to sleep” and the motor will go to zero speed. The drive
will remain “sleeping” until it is commanded to operate at a speed equal to or greater than the SLEEP
THRESHOLD, at which point it will “wake up” and ramp the motor up to the commanded speed.
NOTE 1:
While the drive is in Sleep Mode, the Status portion of the display will read SLEEP.
NOTE 2:
If the drive’s commanded speed goes below the SLEEP THRESHOLD, the SLEEP DELAY timer
will start to count down. If the commanded speed equals or exceeds the SLEEP THRESHOLD before the
SLEEP DELAY times out, the SLEEP DELAY timer will be reset.
NOTE 3:
If the drive is in a Stop state, and the commanded speed is below the SLEEP THRESHOLD, the
drive will immediately go to sleep upon a Start command, by passing the SLEEP DELAY.
37
SLEEP DL
(SLEEP DELAY)
This parameter sets the amount of time the drive must operate below the SLEEP THRESHOLD (see
Parameter 36 above) before the drive “goes to sleep” and brings the motor to zero speed.
60