Lenze SCF frequency inverter - Manual (Page 53)

Lenze 13466146 EDBSF01 v24 EN
53
Troubleshooting and Diagnostics 5
5.2 SCF Display Messages
The following describes the various displays and messages that can appear on the SCF drive.
5.2.1 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.
5.2.2 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
p and q buttons (0-10 VDC, 4-20 mA, etc), and one
of the
p
or
q
buttons is pressed, the display will flash the present speed source message to indicate
that the p and q 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
p and q buttons.
Example 2: The speed source is a 0-10 VDC signal. If the
p
or
q
button is pushed, the display will
flash “EU” to indicate that the present speed source is the 0-10 VDC signal and that the p and q
buttons are invalid.
Refer to the table below for the possible speed reference source displays:
SPEED SOURCE DISPLAYS
DISPLAY DESCRIPTION
CP CONTROL PAD: Speed is set using the p and q buttons on the front of the drive
EI EXTERNAL CURRENT: Speed source is a 4-20 mA signal wired to TB-25 and TB-2.
EU EXTERNAL VOLTAGE: Speed source is a 0-10 VDC signal wired to TB-5 and TB-2.
JG JOG: The drive is in Jog mode, and the speed is set by Preset Speed #2 (Parameter 32).
OP
MOP (Motor Operated Pot): Contacts wired to TB-13B and TB-13C are used to in-
crease and decrease the drive speed.
Pr1 - Pr7 PRESET SPEEDS #1-7: Speed is set by the indicated Preset Speed (Parameters 31-37).