Electro Cam PLUS PS-5000 Series, Programming & Installation Manual

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4-12 Pro g rammin g , S tandard Feature s
S etup Level Pro g rammin g , S tandard Control s : FCN 4
FCN 4 - S peed Compen s ation
( S et u p or M as ter progr a m en ab le m us t b e a ctive)
S peed Compen sa tion i s the ab ility of the control to
au tom a tic a lly a dv a nce a n o u tp u t' s s etpoint s as the m a chine
s peed s u p, th us compen sa ting for the re s pon s e of the
device b eing controlled. E a ch o u tp u t c a n b e individ ua lly
compen sa ted b y a u ni qu e a mo u nt. Thi s a llow s a ll o u tp u t
device s to b e properly compen sa ted, even tho u gh their
re s pon s e s m a y v a ry widely.
S tandard s peed compen sa tion a dv a nce s a nd ret a rd s b oth
the on a nd off edge s of o u tp u t p u l s e s b y the sa me a mo u nt,
proportion a l to the pre s ent m a chine s peed.
Leadin g /Trailin g Ed g e s peed compen sa tion, a v a il ab le on
controller s with the “ L ” option , a llow s a different a mo u nt of
compen sa tion to b e s et for the le a ding a nd tr a iling o u tp u t
edge s in e a ch ch a nnel. S ee p a ge 5-1 for det a il s .
Gray Code s peed compen sa tion i s a v a il ab le on controller s
with the “ G ” option. S ee p a ge 5- 3 for det a il s .
S peed compen sa tion i s s et in u nit s of De g ree s /1000 RPM ,
reg a rdle ss of the s c a le f a ctor b eing us ed. If the re s pon s e of
the o u tp u t device i s known, the a mo u nt of S peed Comp
re qu ired c a n b e c a lc u l a ted:
S peed Comp (Deg/1000 RPM) = 6 x re s pon s e (in m S ec)
EX: 20 m S ec re s pon s e: 6 x 20 = 120 (Deg/1000 RPM)
Progr a m the o u tp u t for the correct on a nd off s etpoint s a t
zero s peed a nd then progr a m s peed comp v a l u e.
If the device re s pon s e i s not known, progr a m o u tp u t for the
correct on a nd off s etpoint s a t zero m a chine s peed. Progr a m
2nd
Pre ss CHN key
to s elect o u tp u t #
3 rd
FCN 4 ENT
1 s t If FCN 4
not s hown pre ss :
Pre ss n u m b er key s followed b y
ENT to ch a nge S peed Comp
v a l u e
OR
DEC
a nd INC key s c a n b e
us ed to a dj us t S peed Comp
v a l u e in 1Deg/1000 RPM s tep s .
Pre s ent S peed Comp
v a l u e for s elected
o u tp u t ch a nnel s hown
Pre s ent O u tp u t
Ch a nnel
S elected
the o u tp u t with a n e s tim a ted s peed comp v a l u e bas ed on
s ix time s the e s tim a ted re s pon s e in m S ec (m S ec = .001
S ec). R u n the m a chine a t a typic a l s peed a nd a dj us t S peed
Comp u ntil the o u tp u t i s properly s ynchronized to the
m a chine.
Note: 1 Degree/1000 RPM re s ol u tion a llow s S peed Comp
to b e a dj us ted very a cc u r a tely. Bec aus e the a dj us tment i s
s o fine, it m a y b e nece ssa ry to m a ke l a rger ch a nge s to the
S peed Comp v a l u e to s ee a ch a nge in m a chine perform a nce.
A ch a nge of 6 degree s /1000 RPM i s needed to m a ke a 1
m S ec difference to the device b eing controlled.
FCN 4 - Ne g ative S peed Compen s ation
(Input Gatin g )
( S et u p or M as ter progr a m en ab le m us t b e a ctive)
Thi s feature i s included on the followin g unit s which
were built after 5-19-92, date code s 9222 or g reater. The
date code i s printed beneath the model code on the
label on the back of the controller:
• All P S -51XX (Re s olver) unit s
• All P S -50XX (Encoder) unit s date code 9740 or
newer, and unit s with "E" option prior to 9740.
Neg a tive S peed Compen sa tion c aus e s a n o u tp u t ch a nnel
to l a g it s progr a mmed m a chine po s ition b y the s pecified
degree s /1000 RPM. It i s us ed when a n inp u t s en s or i s b eing
g a ted b y the corre s ponding o u tp u t ch a nnel into a nother
s y s tem (PLC, regi s tr a tion control, etc.) S ince mo s t s en s or s
h a ve very f as t re s pon s e time s , neg a tive s peed comp i s
needed only where the s en s or i s s low to re s pond, or the
m a chine s peed s a re high a nd s en s or timing i s critic a l.
Example: A ssu me a prod u ct s en s or re qu ire s 5 m s ec to
re s pond, a nd a n o u tp u t ch a nnel provide s a reference window
to a PLC. The PLC will trigger a n a ction only if the s en s or
indic a te s a prod u ct i s pre s ent d u ring the o u tp u t ch a nnel‘ s
reference window. At 1000 RPM, the re s olver will rot a te (5
m s ec x 6), or 3 0 degree s d u ring the s en s or re s pon s e time.
If the reference window i s n’t a l s o del a yed b y 3 0 degree s per
1000 RPM, the s en s or s ign a l m a y mi ss the reference
window.
Neg a tive S peed Compen sa tion i s progr a mmed in Deg/
1000 RPM. If the re s pon s e of the inp u t device i s known, the
a mo u nt of Neg a tive S peed Compen sa tion needed c a n b e
c a lc u l a ted:
S peed Comp (Deg/1000 RPM) = 6 x re s pon s e (in m S ec)
EX: 10 m S ec re s pon s e -6 x 10 = -60 (Deg/1000 RPM)
Bec aus e the PL uS control h as individ ua l s peed
compen sa tion for e a ch o u tp u t ch a nnel, it i s po ss i b le to h a ve
s ome o u tp u t s compen sa ted po s itively while other s a re s et
for Neg a tive S peed Compen sa tion.
(contin u ed next p a ge)
Note: Once pro g rammed in a channel, thi s function will be pre s ent in that channel in all pro g ram s .