50 SF01U
17.0 SCF DISPLAY MESSAGES
The following describes the various displays and messages that can appear on the SCF
drive.
17.1 SPEED DISPLAY
If the drive is in a STOP state (indicated by "- - -" on the display), and the commanded speed
is changed, the display will show the commanded speed, and the upper left decimal point will
turn on solid. About five seconds after a change is made, the display will begin to alternate
between the commanded speed value and the "- - -" display. If the Mode button is pressed,
the display will stop alternating and show the "- - -" display only.
When the drive is given a START command, the displayed speed will start increasing as the
drive accelerates up to the commanded speed. If the commanded speed is changed while the
drive is running, the display will show the commanded speed rather than the actual speed,
until the actual speed reaches the commanded speed.
If the commanded speed is changed faster than the drive can accelerate or decelerate, the
upper left decimal point will blink to indicate that the the drive is accelerating or decelerating to
the new speed. Once the actual speed reaches the commanded speed, the upper left decimal
point will turn on solid for 5 seconds and then turn off to indicate that the commanded speed
has been reached, and that the display is now showing the actual speed.
17.2 CHANGING THE SPEED REFERENCE SOURCE
When the speed source is changed while the drive is running, the display will flash the message
for the new speed source to indicate that the new speed source is active. Also, if the drive is
being controlled from a speed source other than the and buttons (0-10 VDC, 4-20 mA,
etc), and one of the or buttons is pressed, the display will flash the present speed source
message to indicate that the and buttons are invalid.
Example 1: The drive is running and the present speed source is the keypad. TB-13A is
programmed to select a 4-20 mA signal as the speed source. When TB-13A is closed to TB-2,
the display will flash “EI” to indicate that the speed source has changed to the 4-20 mA signal.
If the contact between TB-13A and TB-2 is opened, the display will flash “CP” to indicate that
the speed source has changed back to the and buttons.
Example 2: The speed source is a 0-10 VDC signal. If the or button is pushed, the
display will flash “EU” to indicate that the present speed source is the 0-10 VDC signal and
that the and buttons are invalid.
Refer to the table below for the possible speed reference source displays:
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