Allen-Bradley 2-D Manual do Utilizador Página 90

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Programming
5-21
Advanced Setup Group (continued)
[
An
a
lo
g
I
nv
ert]
Parameter # 84 Factory Default ‘‘Disabled”
[
An
a
lo
g
I
nv
ert]
Parameter Type Read & Write
This parameter enables the inverting function for the 0-10
Volt
a
nd
4-20m
A
a
n
a
log
i
nput s
i
gn
a
l
a
t TB
2.
Units Text Settings ‘‘Enabled”
Maximum Input Commands [Minimum Freq]
Minimum Input Commands [Maximum Freq]
Volt
a
nd
4-20m
A
a
n
a
log
i
nput s
i
gn
a
l
a
t TB
2.
‘‘Disabled”
Maximum Input Commands [Maximum Freq]
Minimum Input Commands [Minimum Freq]
Figure 5.12 Analog Invert
[Maximum Frequency] '
0 V
4 mA
Drive Output
y
10 V
20 mA
y
[Minimum Frequency]
'
Disabled
Enabled
[
4
-
20mA Loss S
e
l
]
Parameter # 81 Factory Default ‘‘Stop/Fault”
[
4
-
20mA Loss S
e
l
]
Parameter Type Read & Write
This parameter selects the drives reaction to a loss of a
4-20m i a w e e a i e [re e re]i
Units Text Settings ‘‘Stop/Fault”
Drive Stops and Issues ‘‘Hz Err Fault” (F29)
i arame er e e e ri e rea i a a
4-20mA signal when the active [Frequency Source] is
4-20m . I p rta t erie a a e
‘‘Hold/Alarm”
Drive Maintains Last Output Freq and sets an Alarm bit
4-20m
A
.
I
m
p
o
rta
n
t
: Th
e
d
ri
v
e
output cont
a
cts c
a
n b
e
e i ea aarm i a e i [O tp t g]
‘‘Max/Alarm”
Drive Outputs [Maximum Freq] and sets Alarm bit
us
e
d to
i
ssu
e
a
n
a
l
arm
s
i
gn
a
l by s
e
tt
i
ng
[O
u
tp
u
t
1 Confi
g]
r [O tp t g] a arm”.I p rta t ia
‘‘Pre1/Alarm”
Drive Outputs [Preset Freq 1] and sets an Alarm bit
o
r
[O
u
tp
u
t
2 Confi
g]
to “
a
l
arm”.
I
m
p
o
rta
n
t
: Loss of s
i
gn
a
l
is defined as a signal < 3.5 mA or a signal > 20.5 mA.
‘‘Min/Alarm”
Drive Outputs [Minimum Freq] and sets an Alarm bit
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