Yaskawa V7 Drives - Manual (Page 39)

2-3
DIGITAL OPERATOR
DESCRIPTION KEY SEQUENCE DISPLAY
Table 2-1. Open Loop Vector Startup Procedure - Continued
Set motor rated current.
(This can be obtained from
the nameplate of the motor.)
Press and hold until n036 is dis-
played on the digital operator.
Then press .
Use the & keys until the
number in the display matches the motor
rated current.
Then press .
DATA
ENTER
V
V
DATA
ENTER
V
Set the motor rated slip.
This can be calculated by
using the following formula:
Slip = (Ns-Nr) * P
120
Where:
Ns = Motor synch. speed
(2)
Nr = Motor rated speed
P = Number of motor poles
Example:
Slip = (1800 - 1725) * 4
120
Slip = 2.5
Press and hold until n106 is dis-
played on the digital operator.
Then press .
Use the & keys until the
number in the display matches the calculated
slip value (see equation at left).
Then press .
DATA
ENTER
V
V
DATA
ENTER
V
Prepare to test run the
drive from the Digital
Operator. Motor should be
disconnected from the load.
This will set the drive into the
“Local” mode and bring up
the motor current display.
Press and hold several times until
the LED is lit.
Press the key once.
Display the drive’s output current by pressing
four times. Turn the Digital Operator
Pot all the way to the left (counter-clockwise.
DSPL
V
LO/RE
DSPL
PRGM
PRGM
PRGM
PRGM
LO/RE
LO/RE
IOUT
(1)
(1)