STANDARD CONTROL/DISPLAY OPERATION
36
Both LEDs Off
where the leading ‘F’ indicates a fault and the
3 digits following the ‘F’ indicate the fault
number. If however, there are no faults
present, the SCDU displays the normal
power-up message:
P - U P
Both LEDs Off
This ‘P-UP’ display will remain on the SCDU
until a key is pressed or a fault occurs.
After Power-Up
After the drive has powered up and the SCDU
display is showing ‘P-UP’ or a fault number, it
can be used to enter new parameters, monitor
drive operation, and/or perform certain drive
diagnostics. Every operation that the SCDU
can perform is called a ‘function’. There may
be up to 1000 functions defined within the
DCU.
All SCDU functions have at least 2 levels, and
some functions use 3 levels. The two colored
LEDs below the lower left corner of the 4-1/2-
digit display are used to indicate which level of
a particular function the SCDU is currently at.
The top level of the SCDU operation is called
the "Function" level. The two colored LEDs
are off when the SCDU is in the "Function"
level. The ▲ or ▼keys are used to select a
function number to be accessed while at this
level. The ▲ key increments the function
number in the display while the ▼ key
decrements it. The SCDU will ramp the
displayed function number when the ▲ or ▼
key is pressed and held for 1/2 second or
longer.
The DATA/FCTN key is used to toggle
between the “Data” level and the “Function”
level. Press the DATA/FCTN key when the
desired function number is in the display. At
this point, the SCDU leaves the "Function"
level and enters the "Data" level. Note that
the green LED is now lit. This operation is
consistent for every function on the SCDU,
although the data actually displayed while the
LED is GREEN is function-number specific.
Examples of every type of SCDU function are
given in subsequent sections. All function
numbers are shared between the SCDU and
the PCDU (Portable Control/Display Unit).
There are some functions, however, that can
only be performed with the PCDU. When
such a function number is selected on the
SCDU and the DATA/FCTN key is pressed,
the SCDU’s display will change to:
P c d u
Both LED’s Off
Changing Parameter Functions
SCDU functions are used to modify and/or
display setup points that the drive needs for
operation. Items that would typically fall into
this category are functions such as Accel
Times, Regulator Gains, Rated Speed and
any other parameters. The following steps
show how to modify a given parameter via the
SCDU display.
1) Use the ▲ and ▼ keys to select the
function number to be accessed. The two
colored LEDs remain off during this step. For
example, if #040 is chosen:
4 0
Both LEDs Off
2) Press the DATA/FCTN key to enter the
"Data" level for this function number. The
green LED is lit to indicate that the number
being shown is the current actual value for
this parameter. For example, if function 40 is
currently set for a value of 10.6, it will be
displayed as:
1 0. 6
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