
SERIAL LINKS
1 6 1
RS2 3 2 PORT 1 3
REFEREN CE E X C H A N GE 4
REFEREN CE E X C H A N GE 4
GET FRO M
REFEREN CE E X C H A N GE 4
1 8 9)REF X C SLV RA TIO
REFEREN CE E X C H A N GE 4
1 9 0)REF X C SLV SIG N
REFEREN CE E X C H A N GE 4
1 9 1)REF X C SL A V E M O N
REFEREN CE E X C H A N GE 4
1 9 2)REF X C M A S TER M N
10.3
R
S232
P
O
R
T1 /
P
O
R
T1
R
EF EXCHANGE
A
ll
o w s the accurate transm
i
ss
i
on of parameters
(typ
i
ca
ll
y a reference) bet w een un
i
ts w
i
th the same
0 V . (The s
l
ave/master mode
i
s set by PORT 1
FUN C TIO N).
In M A S TER mode the un
i
t
i
n
i
t
i
a
t
e
s
h
i
gh band w
i
dth
transm
i
ss
i
on of data, and can a
l
so rece
i
ve data.
In SLA V E mode the un
i
t
w
a
i
ts
to rece
i
ve data and
then
i
mmed
i
ate
l
y transm
i
ts
i
ts o w n data.
Us
i
ng a GET FRO M to source the transm
i
t data, and
and a G O T O to target the rece
i
ved data, w
i
th
i
n
each PL/X
i
n the cha
i
n, g
i
ves u
l
t
i
mate f
l
ex
i
b
ili
ty to
the user. See 1 3.2 Conf
Th
i
s funct
i
on cou
l
d of course be
i
mp
l
emented by us
i
ng
an ana
l
ogue s
i
gna
l
connect
i
on bet w een the dr
i
ves.
Ho w ever
i
f the system requ
i
res greater speed and
accuracy, then th
i
s method may be emp
l
oyed.
See 1 0.1.1 RS2 3 2 PORT 1 / Connect
for deta
il
s of the transm
i
t / rece
i
ve connect
i
ons.
Da
i
sy cha
i
n. W hen us
i
ng more than 2 un
i
ts,
connect RS2 3 2 PORT 1 to an externa
l
term
i
na
l
b
l
ock to separate the transm
i
t and rece
i
ve
connect
i
ons. E.g. from M A STER transm
i
t to
SL A V E1 rece
i
ve, and from SL A V E1 transm
i
t to
SL A V E 2 rece
i
ve etc. The
l
ast SL A V E transm
i
t
can connect to the M A STER rece
i
ve
i
f des
i
red.
W
i
th 2 un
i
ts, the M A STER may use spare SL A V E
b
l
ocks. (Send an
i
nput, and rece
i
ve the output).
For
i
nformat
i
on about transm
i
ss
i
on errors see 8.1.1 1.1 5 DRIV E TRIP MESS A GE / Bad reference exchange.
Mu
l
t
i
D
ri
v
e
D
i
g
i
t
a
l
sp
ee
d
l
o
ck
i
ng
. Da
i
sy cha
i
n us
i
ng reference exchange and encoder feedback for each dr
i
ve.
W hen us
i
ng th
i
s for d
i
g
i
ta
l
speed accuracy,
i
t
i
s
i
mportant that the rema
i
n
i
ng ana
l
ogue
i
nputs do not
i
n
j
ect
sma
ll
errors
i
nto the
l
oop w hen they are dormant. See 6.7 C H A N GE P AR A ME TERS / SPEED C O N TROL.
Usefu
l
t
i
ps for e
li
m
i
nat
i
ng un w anted ana
l
ogue references.
1) The RUN M O DE R A MP output w
ill
rema
i
n at prec
i
se
l
y zero prov
i
d
i
ng the Ramp Ho
l
d (T 1 6)
i
nput
i
s
permanent
l
y h
i
gh and the ramp
i
s not permanent
l
y preset to a non-zero va
l
ue. The ramp
i
nput may often be
used by
li
ne master dr
i
ves, but
i
n the s
l
ave dr
i
ve the ramp shou
l
d be d
i
sab
l
ed us
i
ng T 1 6. Note that the
i
ncom
i
ng d
i
g
i
ta
l
reference may be passed through the ramp funct
i
on by re-conf
i
gur
i
ng the appropr
i
ate
i
nterna
l
PL/X connect
i
ons. In th
i
s case, the ana
l
ogue
i
nput to the ramp (term
i
na
l
T 4)
i
s d
i
sconnected.
2) A na
l
ogue
i
nput 2 (T 2) may be used for
i
nch
i
ng references. In w h
i
ch case
i
t shou
l
d be re-connected
v
i
a
i
nput 1 of the SU M MER 1 apps b
l
ock, w h
i
ch possesses a deadband funct
i
on. Dur
i
ng norma
l
runn
i
ng, the
term
i
na
l
i
s shorted to O V or
l
eft open c
i
rcu
i
t. Th
i
s ensures no s
i
gna
l
passes
i
f the
i
nput rema
i
ns w
i
th
i
n the
deadband. The ana
l
ogue
i
nch reference
i
s set above the deadband so as to g
i
ve the requ
i
red
i
nch
i
ng speeds,
forw ard or back w ard. Se
l
ect
i
on bet w een ana
l
ogue
i
nch
i
ng and abso
l
ute
l
y zero
i
s thus automat
i
c. If T 2
i
s not
be
i
ng used
i
t may be d
i
s-connected, or the UIP2 sca
l
er on PIN 3 2 2 shou
l
d be set to 0.0 0 0 0.
3) Zero
i
nput 3 (T 3) us
i
ng 6.6.7 SPEED REF SU M MER / Speed/Current Reference 3 rat
RE CEIV E. (In SL A V E mode, rece
i
v
i
ng data tr
i
ggers
an
i
mmed
i
ate transm
i
ss
i
on sequence)
Rat
i
o
PIN 1 8 9
+ /-S
i
gn
PIN 1 9 0
S
l
ave
mon
i
tor
PIN 1 9 1
Ref exch
S
l
ave
Goto
TRA NS MIT. (In
i
t
i
ated by the PL/X
i
n Master mode
or by rece
i
v
i
ng data
i
n SL A V E mode)
Getfrom
RS2 3 2
PORT 1
Master
Mon
i
tor
PIN 1 9 2
Summary of Contents for PLX
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