Fuji Electric Frenic lift, Reference Manual

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2.3 Overview of Function Code
C
hap.
2
FUN
CT
IO
N
C
O
D
E
S
H72 Main power shutdown detection (Mode selection)
This function monitors the AC input power supply of the inverter to see if the AC input power
supply (main circuit power) is established and prevents inverter operation when the main circuit
power is not established.
H72 data Function
0 Disables main circuit power cutoff detection
1 Enables main circuit power cutoff detection
With power supply via a PWM converter or DC link bus, there is no AC input. When H72 is set to
“1”, the inverter cannot operate. Change the data of H72 to “0”.
For single-phase supply, consult your Fuji Electric representatives.
H74 Speed Agreement (Hysteresis)
H75 Speed Agreement (OFF delay time)
The
DSAG
signal can be assigned to a general-purpose, programmable output terminal by setting
"71."
The
DSAG comes ON regardless of the status of a run command when the difference between the
commanded and detected speeds is within the hysteresis band specified by H74. The ON-to-OFF
delay circuit is available for chattering avoidance. If the difference is larger than the allowable band
specified by H74 continuously for the time specified by H75, then the
DSAG
signal goes OFF. No
OFF-to-ON delay function is available.
- Data setting range (H74): 0.00 to 6000 (r/min)
- Data setting range (H75): 0.00 to 1.00 (s)

Data setting range changes depending on the number of poles of motor etc. For details, refer to
section 2.2.
L09: Filter
time constant
for reference
speed (final)
＋
－
Speed
regulator
S-curve ramp
controller
Reference
speed
(pre-ramp)
Detected
speed
OFF
ON
0 Negative
deviation
Positive
deviation
Deviation
Speed agreement
signal DSAG
H74: Hysteresis
OFF delay
H74: Hysteresis H74: Hysteresis
H75: Speed
agreement
OFF delay time
2-97