YASKAWA Varispeed-616GII Instruction Manual page 38

A4-7-1 Description of Functions (Cont'd)
(6) External coasting stop command function
When the external coasting stop command is closed, the operation depends or,
the input state of the forward run command and reverse run command .
-When either the forward run command or reverse run command is closed, and
the external coasting stop command is also closed, only coasting stop is ac-
complished and the frequency is maintained .
-When both the forward run command and reverse run commands are open,
and the external coasting stop command is closed, coasting stop is accom-
plished and the frequency is changed to 0 Hz .
(7) Search function (rise detection)
When the search command is made to close, the base is blocked for 0 .5 second,
then the speed search is made. The operation depends on the selected func-
tion either 7 or 8 . Note : functions 7 and 8 cannot be simultaneously selected .
-When 7 is set, the speed search begins with the highest set frequency .
,-When 8 is set, the speed search begins with the frequency command that has
been set after the search command was input .
FORWARD RUN COMMAND
SPEED SEARCH COMMAND
OUTPUT FREQUENCY
WITHIN 0 5 SEC
' 0 5 SEC '
SPEED SEARCH
FREQUENCY COMMAND
AT SPEED SEARCH INPUT OR
TOP FREQUENCY
Fig . 13 Time chart at Speed search command Input
Note : When using this function by continuous operation mode at
momentary stop, hold speed search command externally .
(8)
Energy-saving operation function
When the energy-saving operation command is made to close during speed
synchronization, energy-saving operation shown in Fig . 14 is carried out .
In the energy-saving operation, the output voltage is the value of the
energy- saving gain (control constant 30, set to 80% at shipment from the
factory) multiplied by the V/f constant set with control constants 1 to 7 .