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VAMP 257
Feeder and motor manager
Technical description
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VM257.EN002
The stage will give a start signal when the second last start has
been done. The trip signal is normally activated and released
when there are no starts left. Figure 2.3.9-1 shows an
application.
N>
motor start inhibit
I
>
tri
p
N>
alarm
I
>
start
T
1
VAMP 257
Output matrix
+
-
-
+
+
M
Open
coil
Close
coil
STOP
START
257NStageAppl
A1
Figure 2.3.9-1 Application for preventing too frequent starting, using the N>
stage. The relay A1 has been configured to be “normal closed”. The start is
just an alarm telling that there is only one start left at the moment.
Parameters of the frequent start protection:
N> (66)
Parameter Value/unit Description
Mot strs
Motor starts in last hour
Measured
value
T
Min
Elapsed time from motor start
Sts/h
Max. starts in one hour
Setting
values
Interval Min
Min. interval between two
consecutive starts
SCntr
Start counter (Start) reading
TCntr
Trip counter (Trip) reading
1StartLeft 1 start left, activates the N>
start signal
MaxStarts Max. start trip, activates the
N> trip signal
Descr
Interval
Min. interval between two
consecutive starts has not yet
been elapsed, activates the N>
trip signal
Tot mot
Strs
Number of total motor starts
Mot Strs/h
Number of motor starts in last
hour
Recorded
values
El. Time
from mot
Strt
Min
Elapsed time from the last
motor start