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456 Control chain diagrams
Direction lock
OR
20.
21
D
ire
c
ti
o
n
= Re
v
e
rs
e
20
.2
1 Di
re
c
ti
o
n = Re
qu
es
t
AN
D
Re
ve
rs
e
co
m
m
a
n
d
a
c
ti
v
e
MA
X
Input
r
e
fe
renc
e
0
x
-1
2
0
.21
D
irec
ti
on
=
R
e
q
ues
t
AN
D
OR
R
e
fe
renc
e f
ro
m
F
B
R
e
fe
renc
e f
ro
m
P
ID
Re
fe
re
nc
e f
rom
M
o
to
r pot
e
n
ti
om
et
er
Re
fe
re
nc
e f
rom
P
a
n
e
l
AN
D
x
-1
Out
put
r
e
fe
renc
e
20.
21
D
ire
c
ti
o
n = Re
que
s
t
Re
ve
rs
e
co
m
m
a
n
d
a
c
ti
ve
S
a
fe
re
fe
re
nc
e
R
e
fe
renc
e f
ro
m
A
I
R
e
fe
renc
e f
ro
m
A
P
J
o
ggi
n
g
re
fe
re
nc
e
Co
ns
ta
nt
r
e
fe
re
n
c
e
OR
R
e
fe
renc
e f
ro
m
F
B
Re
fe
re
nc
e f
rom
P
a
n
e
l
R
e
fe
re
n
c
e
fr
o
m
AI
R
e
fe
re
n
c
e
fr
o
m
AP
In
p
u
t r
e
fe
re
n
c
e
>
0
ACS580 FW.book Page 456 Wednesday, September 21, 2016 9:48 PM