1 4 4
M O T OR DRIV E ALARMS
8.1.1 1. 4 DRIV E TRIP MESS A GE / F
i
e
l
d
l
oss
See 8.1.3 M O T OR DRIV E AL ARMS / F
A
l
arm de
l
ay t
i
me: 2 secs.
8.1.1 1. 5 DRIV E TRIP MESS A GE / User tr
i
p
There
i
s a h
i
dden PIN 7 1 2 that w
ill
cause a tr
i
p after go
i
ng h
i
gh.
Use a
j
umper to connect to f
l
ag source. See 1 3.2.4 JU MPER connect
ons. A
l
arm de
l
ay t
i
me: 0.5 secs.
8.1.1 1. 6 DRIV E TRIP MESS A GE / Therm
i
stor on T 3 0
It
i
s good pract
i
ce to protect D C motors aga
i
nst susta
i
ned therma
l
over
l
oads by f
i
tt
i
ng temperature sens
i
t
i
ve
res
i
stors or s w
i
tches
i
n the f
i
e
l
d and
i
nterpo
l
e w
i
nd
i
ngs of the mach
i
ne. Temperature sens
i
t
i
ve res
i
stors have
a
l
o w res
i
stance (typ
i
ca
ll
y 2 0 0 Ohms) up to a reference temperature (1 2 5 deg C). A bove th
i
s, the
i
r
res
i
stance r
i
ses rap
i
d
l
y to greater than 2 0 0 0 Ohms.
Temperature s w
i
tches are usua
ll
y norma
ll
y c
l
osed, open
i
ng at about 1 0 5 deg C.
Motor overtemperature sensors shou
l
d be connected
i
n ser
i
es bet w een term
i
na
l
s T 3 0 and T 3 6. If the motor
temperature r
i
ses such that the res
i
stance of the sensor exceeds 1 8 0 0 Ohms, the therm
i
stor a
l
arm w
ill
be
act
i
vated. If th
i
s happens, the motor must be a
ll
o w ed to coo
l
before the a
l
arm can be reset.
Motors overheat due to many factors, but the most common cause
i
s
i
nadequate vent
il
at
i
on. Check for
b
l
o w er fa
il
ure, wrong rotat
i
on of the b
l
o w er, b
l
ocked vent
il
at
i
on s
l
ots and c
l
ogged a
i
r f
il
ters. O ther causes of
overheat
i
ng re
l
ate to excess
i
ve armature current. The nom
i
na
l
armature current on the motor namep
l
ate
shou
l
d be checked aga
i
nst the current ca
li
brat
i
on for the PL/X .
There
i
s no motor temperature a
l
arm
i
nh
i
b
i
t; term
i
na
l
s T 3 0 and T 3 6 must be
li
nked
i
f over-temperature
sensors are not used.
Note. There
i
s a f
l
ag on h
i
dden PIN 7 0 2 w h
i
ch w arns of therm
i
stor over-temp after the norma
l
de
l
ay t
i
me.
Th
i
s f
l
ag
i
s reset by a start or
j
og command.
A
l
arm de
l
ay t
i
me: 1 5 secs.
8.1.1 1. 7 DRIV E TRIP MESS A GE / O verspeed
If the speed feedback s
i
gna
l
exceeds 1 1 0 % of rated speed for
l
onger than the a
l
arm de
l
ay t
i
me, then the
overspeed a
l
arm
i
s act
i
vated. Th
i
s a
l
arm
i
s
li
ke
l
y to be caused by a bad
l
y ad
j
usted speed
l
oop or overhau
li
ng
of motors contro
ll
ed by 2 Q uadrant mode
l
s.
A
l
arm de
l
ay t
i
me: 0.5 secs. + (8.1.7 M O T OR DRIV E AL ARMS / O verspeed de
M O T OR DRIV E AL ARMS 2
DRIV E TRIP MESS A GE 3
DRIV E TRIP MESS A GE 3
FIELD LO SS
M O T OR DRIV E AL ARMS 2
DRIV E TRIP MESS A GE 3
DRIV E TRIP MESS A GE 3
T HERMIST OR O N T 3 0
M O T OR DRIV E AL ARMS 2
DRIV E TRIP MESS A GE 3
DRIV E TRIP MESS A GE 3
O V ERSPEED
M O T OR DRIV E AL ARMS 2
DRIV E TRIP MESS A GE 3
DRIV E TRIP MESS A GE 3
USER TRIP
Summary of Contents for PLX
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