Function library
7-44
L
EDSVS9332P-D21 EN 3.0
7.5.5.2 Absolute value encoder via system bus (CAN)
Purpose
•
Using absolute value encoders with CAN interface (e. g. laser measuring system).
⋅
9300POS009
x x
A b a r b e i t u n g s t a b e l l e
p r o c e s s i n g l i s t
P O S
2 0
C A N - I N 3
C A N - I N 3 . D 1
* *
t r a n s m i t t e d a b s o l u t e
e n c o d e r v a l u e
F I X E D - 1
F I X E D - 1
C O N V P H P H 2
x
y
1
C O N V P H P H 2
- O U T
C O N V P H P H 2 - N U M
C O N V P H P H 2 - I N
C O N V P H P H 2 - A C T
C O N V P H P H 2 - D E N
F C O D E - C 4 7 3 / 4
1 8
F C O D E - C 4 7 3 / 5
( a d j u s t e d v a l u e )
( a d j u s t e d v a l u e )
P O S - A B S - I N
C 1 3 6 4 / 2
C 1 3 6 5 / 2
P O S - A B S - S E T
C 1 3 6 1 / 2 1
C 1 3 6 0 / 2 1
M C T R L - P H I - A C T
+
P O S - A C T P O S
P O S - T P
C 1 3 6 2 / 7
C 1 3 6 3 / 7
P O S - N O U T - G A I N
C 1 3 6 2 / 5
C 1 3 6 3 / 5
-
C 1 2 2 1 / 3C 1 2 2 0 / 3
P O S - P H I - A D D
C 1 3 6 6 / 1
C 1 3 6 7 / 1
P O S - A B S - V A L
+
+
+
+
+
-
( T o u c h P r o b e )
0
1
C 1 2 2 1 / 7
h o m e p o s i t i o n
h o m e o f f s e t
C 1 2 2 1 / 1 6C 1 2 2 0 / 1 6
C 1 2 2 5
S e t
( f e e d b a c k s e l e c t e d u n d e r C 4 9 0 )
C 1 2 2 1 / 8
C 1 2 2 7
( G e n e r a t i o n o f a c t u a l p o s i t i o n )
( I n f l u e n c e o f f e e d f o r w a r d v a l u e s )
F I X E D 0 %
Fig. 7-20 Absolute value encoder via system bus (CAN)
Function
•
All absolute value encoders with a CAN interface to specification “CAL DS-301” (CAN op en)
can be used.
•
The CAN parameters, especially CAN baud rate, CAN identifier, and cycle time are to be set
accordingly. The set CAN parameters must be storable in the encoder!
•
The absolute value read via, for instance, CAN-IN3.D1 is sent to the input “POS-ABS-IN”.
•
Input “POS-ABS-SET” is assigned to 1 signal (e.g.: FIXED1) and thus the acceptance of the
absolute value at input POS-ABS-IN is activated.
•
POS-ABS-SET = HIGH sets the homing status “REF-OK” automatically, homing is therefore
not necessary.
•
The encoder resolution is adapted to the internal position resolution of 65536 inc/rev via the
function block CONVPHPH2. The adaptation factor is entered via the free codes C473/4 and
C473/5.
Tip!
TheinputPOS-PHI-ADDandtheoutputPOS-ABS-VALareavailableasoffirmwareversion
≥
2.5
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