Fuji Electric Frenic lift, Reference Manual

Page: 162 / 254

2.3 Overview of Function Code
C
hap.
2
FUN
CT
IO
N
C
O
D
E
S
Deceleration point programming and moving distance
Creepless operation requires accurately programming the position of a deceleration point. Given
below is a programming method using the calculation result of the moving distance from the start of
deceleration to a stop.
The moving distance from "

Deceleration" to "

Stop" in the speed pattern shown below is given
by the following equation. Note that N should be equal to or greater than the S-curve zone (N ≥ F03
x (Sc/100 + Sd/100).
Tdec V C L × × = max
Equation 1








−
+






× +






× =
60
2 2
max 100 max 2
1
2
Sc Sd
N
N Sc
N
N
C
Equation 2
Where
Vmax: Elevator speed (L31) (mm/s)
Nmax: Motor’s rated speed (F03) (r/min)
N: Motor speed at the start of deceleration (r/min)
Tdec: Deceleration time specified (s)
Sc, Sd: S-curve zone specified (%)
Sc
Sd
Tdec
Speed (r/min)
Time t (s)
①
Start
②
Maximum speed
④
Stop
Sa
Sb
Tacc
③
Deceleration
N
0
The elevator cage moves by distance "L" calculated by equations 1 and 2 when the elevator
decelerates from speed "N" during deceleration period "Tdec" within S-curve zone from "Sc" to
"Sd," provided that no speed error exists in inverter control. The deceleration point, therefore, should
be distance "L" or more before the stop position.
\
Conditions required for starting a creepless operation
When all of the following three conditions are met, a creepless operation starts.
(1) A creepless operation command is entered.
That is,
- The
CRPLS
command is turned ON when the
CRPLS
is assigned to a terminal.
- Any speed command (except zero speed) is changed to zero speed command when the
CRPLS is not assigned to any terminal.
(2) The reference speed (pre-ramp) is 0.00 r/min.
(3) The remaining moving distance (the internally calculated moving distance from the start of a
creepless operation) is nonzero.
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