Fuji Electric FRENIC-ECO, Инструкция по эксплуатации

Страница: 175 / 246

5-67
Searching for idling motor speed to follow
The frequency drop caused by the current limiting control during auto search for idling
motor speed is determined by the frequency fall rate specified by H14.
To use the auto search, be sure to enable the instantaneous overcurrent limiting (H12 = 1).
Select starting characteristic (STM) (Digital input signal)
The (STM) terminal command specifies whether or not to perform auto search operation for idling
motor speed at the start of running.
Data for H09
Auto search for
idling motor speed
"Select starting
characteristics"
terminal command
(STM)
Function
0 Disable - Start at the starting frequency
ON Start at the auto search frequency
specified by H17
3, 4, 5 Enable
OFF Start at the starting frequency
Frequency for idling motor speed (H17)
H17 specifies the auto search frequency for idling motor speed. Be sure to set a value higher than
the idling motor speed. Otherwise, an overvoltage trip may occur. If the current motor speed is
unknown, specify "999" that uses the maximum frequency at the start of auto search operation.
Auto search for idling motor speed (H09)
H09 specifies the starting rotational direction (forward/reverse) of the auto search and the starting
pattern (patterns 1 to 4). If the motor is idling in the reverse direction that is against the specified
direction because of natural convection, it is necessary to start it in the direction opposite to the
rotational direction of the original reference frequency.
When the rotational direction of the idling motor is unknown, two starting patterns are provided as
listed below, which start search from the forward rotation and, if not succeeded from the reverse
rotation (e.g. H09 =5, pattern 3), start search from the reverse rotation (e.g. H09 =5, pattern 4).
Data for H09 Run command
Rotational direction
at the start of auto search
Starting pattern
Run forward Forward Pattern 1
3
Run reverse Reverse Pattern 2
Run forward Forward Pattern 3
4
Run reverse Reverse Pattern 4
Run forward Reverse Pattern 4
5
Run reverse Forward Pattern 3