SM01P 48
17 SCL/SCM DISPLAY MESSAGES
The following paragraphs describe the various displays and messages that can appear
on the SCL/SCM 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-11, 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-11 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.
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