TB Wood's WFC1000 Series, Installation, Operation And Maintenance Instructions

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Parameter Units Level
84-DISP - Display Option Full Setting L2
Parameter 84-DISP, along with parameter 85-UNITS, allows the bottom line of the keypad display to be
programmed in engineering units such as RPM, Bottles per hour - BPH or any desired unit up to five
characters long.
With factory default setting of "0", the display will present the commanded output frequency being delivered
to the motor. As long as the speed command does not change, the display will not change.
With data code "1" selected, the operating display will change as the inverter makes changes in the output
frequency to maintain commanded performance (stator frequency). For example, slip compensation and
regenerative current limit make changes in the stator frequency (See parameter 1A-FOUT2, an option
parameter). For more information on option parameters, see parameter 81-PRGNO.
The basic question that must be answered is, "What numeric indication do we want the display to indicate at
if we're operating at maximum frequency (parameter 32-FMAX)?" This value may be modified to
compensate for the number of decimal places programmed at parameter 85-UNITS. For example, to indicate
1800.0 RPM on the display at FMAX = 60 Hz, enter 18000 at parameter 84-DISP. Entries must be within the
range of 10-65000.
85-UNITS - Display Units Setting L2
The programming for 85-UNITS is different from most parameters, in that the keypad keys operate
differently. The UNITS identifier has up to a six-character format with each of the first five characters having
the ability to display characters from the following list:
blank, #, %, +, -, ., /, 0 thru 9, :, <, =, > and A thru Z
The last character is a number between 0 and 9. If this value is set between 0 and 5, it will assign the
position of the decimal place in the engineering units display. The factory setting is "R P M _ _ 1" which will
display the value programmed at 84-DISP with one decimal place.
If the last character is selected to be "9", the retention time function is invoked. This is, rather than a
frequency / speed proportional output, a reciprocal function. The maximum display is 655.34 (dependent on
the value programmed at 84-DISP); at output frequencies less than that, or less than 3.2 Hz, the display will
indicate "_ _ _._ _". Two decimal places are maintained in this mode of operation and cannot be changed.
Retention Time Example -
Assume the following program settings:
The display versus output frequency would be:
32-FMAX = 60 Hz Motor Frequency Display
31-FMIN = 10 Hz 60 10.00 MIN
84-DISP = 1000 40 15.00 MIN
85-UNITS = MIN__9 30 20.00 MIN
20 30.00 MIN
10 60.00 MIN
To program 85-UNITS:
1. Press the STOP key if the inverter is running.
2. Hold the SHIFT key while pressing the PROGram key to enter Level 2.
3. Press the SHIFT key. The cursor will appear under the leftmost character in
the data field.
4. Use the UP/DOWN arrow keys to scroll through the available choices.
5. Press the SHIFT key to move the cursor one place to the right.
6. Repeat steps 4 & 5 to complete the character selections.
7. The sixth position requires a number from 0-9 and either determines the number of decimal places in the display
or whether the retention time function is activated.
8. Press the ENTER key to store the engineering units display in memory or the SHIFT key to move the cursor back
to the first position.
After 84-DISP and 85-UNITS have been set, the inverter output will be set and displayed in the engineering
units format.
D I S P L A Y U N I T S
P R O G 8 5 : R P M _ _ 1
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