User manual
8-1
DSC/DSCT Series
8. DIAGNOSTICS
8.1. DISPLAYS
The logic and analog values can be displayed on keypad or by serial line determining the diagnostic in case
of failures, protections or uncorrect working. The respective detailed list is reported on 9.3.
8.2.
EXCLUSION AND ALARMS
In presence of any alarm the drive goes in block and the signal DRIVE READY becomes inactive. When the
drive is in alarm situation the display flashes; it can be seen which are the alarms looking at the alarm
indications (
Axx
) and watching which are active (H); the inactive alarms are low (L).
The alarms reset has effect if the failure causes have been removed. The reset is done by the programmed
input or by keypad
c30
=0
→
1.
With connection
c19
it can be excluded the intervention on the drive of the following alarms:
c19
=0 no alarm excluded
c19
=1 excluded power alarm (
A3
)
c19
=2 excluded radiator thermal switch alarm (
A4
)
c19
=4 excluded motor thermal switch alarm (
A5
)
c19
=8 excluded overspeed alarm (
A9
)
c19
=16 excluded resolver failure alarm (
A7
)
It can be excluded more alarms at the same time by setting in
c19
a number between 1 and 31 calculated in
the following way:
c19
=1x
A3
+ 2x
A4
+ 4x
A5
+ 8x
A9
+ 16x
A7
where the Ax can assume the values 0 or 1 if it isn’t or it is desired the exclusion of the relative alarm.
Example of excluded alarms
C19
= 16 exclusion of resolver alarm
C19
= 8 exclusion overspeed alarm
C19
= 24 exclusion of resolver and overspeed alarms
The excluded alarms, even if do not have effect on the drive, will be anyway displayed on the keypad and in
particular
A3
and
A9
make the display flashing.
The motor thermal switch alarm (
A6
) is configurable with the connection
c34
in way that it’s intervention can
block the drive (
c34
=0) or low the limit of maximum current at the nominal value of the motor (
c34
=1 for
default).
The power alarm (
A3
), if operates for an effective problem on the power circuit (for example for a short-
circuit), can put in block one or more power IGBT and so the drive can stop even in case of it’s exclusion.
The reset of the block in that case can be done only switching down the converter.
