ON
Speed
0
High speed
Creep speed
FWD
SS1
SS2
SS4
ON
ON
ON
ON
BRKE1
Brake1
Release
BRKS
ON
Stop speed(F25)
H67
L82
L84
L83
L84
BRKE2
ALM
Brake2
Release
ON
ON
ON
EN (EN1,EN2)
ON
Inverter doesn’t Generate bbE, because L84 timer
is not expired.
ON
Release
L84
Inverter doesn’t trip bbE.
Figure 4. Inverter doesn’t trip
bbE
alarm even BRKE2 signal is OFF during travel.
On the other hand, figure 4 shows that brake 2 is not working properly for a while as well, even so,
as brake recovers before L84 timer elapses, no alarm is generated.
d)
Brake feedback is abnormal when motor is stopped.
In this case there are two possibilities, with and without
RBRK
function active (Rescue operation by
external brake control active).
ON
Speed
0
FWD
SS1
SS2
SS4
BRKE1
Brake1
Release
BRKS
L84
BRKE2
ALM
Brake2
Release
ON
EN (EN1,EN2)
Inverter trips bbE
ON
L84
ON
Inverter doesn’t trip bbE, because L84 timer is not
expired.
Figure 5.
bbE
alarm while inverter is stopped and
RBRK
function is not used.
As it can be observed in figure 5, somebody or something is opening the brake even inverter is not
asking to do so. In other words, brake is manipulated even it should be closed. If the brake remains
open more than time specified in L84 timer, inverter trips
bbE
alarm.
2-102
Содержание Frenic lift
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