Fuji Electric Frenic lift, Справочное руководство

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2.3 Overview of Function Code
C
hap.
2
FUN
CT
IO
N
C
O
D
E
S
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Rescue operation by brake control (Speed limit)(L117)
In this parameter, maximum speed allowed during rescue operation by brake control is set.
Maximum speed limit is set in mm/s.
As soon as lift reaches speed set in this parameter,
BRKS
signal will turn to OFF. While
RBRK
input
is ON, and lift speed is below this level,
BRKS
signal will be ON.
■
Rescue operation by brake control (Apply time) (L118)
When
BRKS
signal turns to OFF (brake closes) because lift speed reaches L117 level, lift speed will
decrease until 0 mm/s. When lift speed reaches level set on function code L108, timer L118 starts to
count.
BRKS
will turn ON (brake open) when time set on L118 elapses.
The setting of timer L118 must be lower than the setting of L119 timer, otherwise inverter will trip
rbA unnecessarily.
■
Rescue operation by brake control (Speed detection delay time) (L119)
When BRKS signal is ON (brake opened) some detected speed from the motor is expected. If no
speed is detected, it can be because motor is not turning (balanced condition or locked condition) or
because encoder is broken.
It is understood as no speed detected, no movement, any speed below speed level set on L108. When
speed is below L108 timer L119 starts to count. If speed doesn’t reach speed level set on L108 when
timer L119 elapses, inverter will trip rbA alarm.
The setting of timer L118 must be lower than the setting of L119 timer, otherwise inverter will trip
rbA unnecessarily.
Figure 1 shows a rescue operation by motor brake control when speed limit is not reached. As it can
be observed, as soon as
RBRK input function is activated, brake opens. After that motor speed
increases because of gravity effect. Speed is below level set in function code L117. Because limit is
not reached,
BRKS signal is not going to OFF. RBRK signal is removed by the controller when floor
level is reached.
Motor Speed
(mm/s)
0
L117
RBRK
BRKS
ON
ON
RUN command
(FWD or REV)
EN1&EN2
L108
Figure 1. Timing diagram when limit speed is not reached.
Figure 2 shows a rescue operation by motors brake control when L117 speed limit is reached. As it
can be observed, as soon as RBRK input function is activated, brake opens. Motor reaches a certain
speed which is over L117 speed limit. At this point BRKS signal goes to OFF. Inverter waits L118
time to set BRKS to ON again. RBRK signal is removed by the controller when floor level is
reached.
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