M-Maxâ„¢ Series Adjustable Frequency Drive - Eaton Corporation

Setpoint Input (REF)
REF: Setpoint value definition (Reference) via the operating unit.
The settings of the frequency setpoint via the keypad have the same effect as the function of
an electronic motor potentiometer. The set value is written in parameter P6.15 and can also
be changed there. It is retained also with a disconnection of the supply voltage.
A frequency reference value that is set under REF is only effective with the KEYPAD control
level activated.
The following table shows a good example of specifying the frequency setpoint value via the
operating unit.
Setpoint Input (REF)
Sequence Commands Display Description
1 Activate control level KEYPAD with the LOC/REM button.
The arrow ( ) points to menu item REF
LOC
REM
I
REF
MON
PAR
FLT
READY
RUN STOP ALARM FAULT
FWD REV I/O KEYPAD BUS
Parameters
Actuating the START button enables the RUN mode (rotating field
direction FWD)
The STOP button (P6.16 = 1) activates the STOP mode. The Stop
function is set at parameter P6.8
2 READY RUN STOP ALARM FAULT Pressing the OK button activates the setpoint entry (right-hand
segment flashing)
OK
REF
MON
PAR
FLT
FWD REV I/O KEYPAD BUS
The two arrow buttons (< or >) are used to select the entry digit
(cursor)
The arrow buttons or are used to select the value of the entry
digit (0, 1, 2, …9, 0)
Note: Changes in the frequency setpoint are only possible if the
number display is flashing (Hz), even in RUN mode. The value is
stored when the display is constant
When the supply voltage is switched off, the last setpoint entered
(see P6.15) and the KEYPAD mode are stored
M-Max Series Adjustable Frequency Drive MN04020003E—April 2011 www.eaton.com 127