Lenze MCH Series - Manual (Page 62)

58 13435744_EDBMH01_v13
31 UNITS (SPEED/PID UNITS)
This parameter sets the units of the output speed or the PID display on the keypad. The
following choices are available:
speed:
HERTZ pid: CFM (cubic feet per minute)
speed: RPM (revolutions per minute) pid: GPM (gallons per minute)
speed: %HZ (percent Hertz) pid: IN (inches)
speed: /SEC (units per second) pid: FT (feet)
speed: /MIN (units per minute) pid: /SEC (units per second)
speed: /HR (units per hour) pid: /MIN (units per minute)
speed: GPH (gallons per hour) pid: /HR (units per hour)
speed: NONE (no units displayed) pid: F (degrees Fahrenheit)
pid: % (percent of PID feedback) pid: C (degrees Celsius)
pid: PSI (pounds per square inch) pid: MPM (meters per minute)
pid: FPM (feet per minute) pid: GPH (gallons per hour)
NOTE: If one of the “pid” units is selected, but the drive is in HAND (open-loop)
speed control mode or PID MODE is DISABLED, the displayed speed units
will default to HERTZ.
32 HZ MULTIPLIER
The HZ MULTIPLIER is used to scale the output speed indication on the display. This
parameter is only active when UNITS is set for speed: RPM, speed: /SEC, speed: /MIN,
speed: /HR or speed: GPH. Multiplying the output frequency by the HZ MULTIPLIER
will yield the desired speed value on the display.
Example:
The desired speed unit is RPM with a standard 60 Hz, 1800 RPM motor.
Set UNITS to speed: RPM and set HZ MULTIPLIER to 30.00. This will
result in a display of 1110 RPM for an output frequency of 37 Hz (37 Hz
X 30 = 1110 RPM). Also, if there is a 100:1 gear reducer in the system,
Parameter 33 - UNITS DECIMAL could be set to XX.XX to represent the
output of the gear reducer (11.10 RPM in the example).
33 UNITS DECIMAL (UNITS DECIMAL POINT)
In “non-PID” mode, UNITS DECIMAL selects the decimal point location of the speed
display. UNITS DECIMAL has no effect if UNITS is set to speed: HERTZ or speed: %
HZ.
In PID mode, UNITS DECIMAL selects the decimal point location for the PID SETPOINT
and FEEDBACK displays, and FEEDBACK @ MIN and FEEDBACK @ MAX.
The possible settings are: XXXXX, XXX.X, XX.XX, X.XXX, and .XXXX. Refer to the
above example in Parameter 32 - HZ MULTIPLIER.
34
LOAD MULTIPLY
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 %) of the drive output
current rating to the motor full load current rating will scale the load display to show
motor load instead of drive load. This will result in a display of 100% when the motor is
at full load.