Fuji Electric Frenic lift, Справочное руководство

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Short circuit control (Control mode) (L120)
Behavior of motor phase short circuit can be defined by means of this parameter. Depending on
L120 setting, short circuit will be performed under different conditions.
Data for L120 Action
0 (default setting)
SCC output function will turn ON when RUN command is ON (FWD
or REV) and EN terminal is ON.
SCC output function will turn OFF when IGBT’s gate drivers are OFF
and timer L86 is elapsed.
1
SCC output function will turn OFF only in certain conditions.
Conditions are described below:
- Case 1 : Inverter in alarm ( ALM output function ON).
- Case 2 : RBRK input function is ON. It means that rescue by
brake control will be performed.
- Case 3 :
BRKE
,
BRKE1
or
BRKE2
input functions are ON and
BRKS output function is OFF. It means that somebody opened
the brake by “external means”.
- Case 4 :
STBY
input function is ON. In this case energy will be
saved by not keeping energized motor short circuit contacts.
In other words, function SCC will remain ON (no short circuit) always
except in above mentioned cases.
In case of blackout, L86 delay time cannot be ensured. In order to avoid early contact
closing, it is recommended to use a normally closed contact with programmable delay at
closing. In this case, in order to avoid extra delays, L86 can be set to 0.00s.If the
programmable delay is not used, L86 should be set to greater than default setting.
In case of contactorless configuration, L85 timer is not necessary, in this case please set
L85=0.00s.
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Short circuit control (Check time) (L121)
This is the time that inverter will wait to receive short circuit contact feedback ( SCCF input
function). In case of using SCC function, to have short circuit contact feedback ( SCCF input
function) is a must. L121 function code must be set to a time longer than short circuit contact
reaction time.
If L121 time elapses and no feedback is received (SCCF remains OFF), inverter will be blocked by
alarm SCA.
This timer is only valid when output function
SCC is used.
In below figures, different time charts show the behavior of
SCC
and
SCCF
functions depending on
the setting of function code L120. In case that L120=0 (default setting),
SCC
will turn ON and OFF
each travel according to below situations shown in each figure.
In figure 1 a standard travel timing sequence is shown.
Speed
0
High speed
Creep speed
Run command
(FWD, REV)
ON
SCC
Short-circuit contact
Open
SCCF
Stop speed(F25)
H67
L120
L56 L86
IGBT’s gate
Active
ON
EN1&EN2
ON
ON
L120
Figure 1. Standard travel timing sequence with feedback contacts.
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