Positioning module IMD20, IMD40
CanOpen protocol
The transfer of synchronous PDOs can again be subdivided into two types:
are transferre
cally
ng
n
le nu
YNC impulses
(1-240).
cycli
tern l event. They are transferre
SYNC
al, but not periodically.
•
Cyclic PDOs
d periodi
accordi
to a adjustab
mber of S
•
A
c PDOs are released
sign
by an in
a
d synchronously with the
SYNC
SYNC
SYNC
SYNC
SYNC
Time
Cyclic PDO
Acyclic PDO
e
tin
n
v
PD
at
given in the object directory for R_PDOs as of index 1400h and for T_PDO
index 1800h. The
y
Th set
g of the type of tra sfer of PDOs is made ia
O communic ions parameters that are
s as of
following table shows an overview of the types of transfer and allocation to the parameter
transmission type.
T pe no. Cycl
Acy
Sync
Asyn
RTR Description
ic
clic
hron
ous
chron
ous
only
0
x
x
Transfer to SYNC, but not periodical
1-24
x
DO: transfe
RPDO: application of the data at the xth SYNC.
0
x
TP
r after every xth SYNC.
241-251
Reserved.
252 x x
Objects in the PDO are updated with every SYNC, but
only sent upon demand (RTR).
253
x
ct
h
e up
ent when the
is
v
x
Obje
RTR
s in t
recei
e PDO ar
ed.
dated and s
254
s
x Not
u ed.
255
x Event-controlled PDO. The transfer is triggered by a
ble
change of the mapped parameter or an adjusta
timer.
S
The SYNC signal provides a common cycle which can be us
ll connected participants e.g. for
e
O
NC
t
CanOpen participant an
ati
ous o
signal plays an important role for the drive module in the Interpolation mode of operation.
rordinate control must communicate to the module beforehand the time interval of the
this, the valu
) in the
"C
u
Cycle
006
h
has to be
entered.
YNC
ed by a
th
partici
PD
p
transfer. The SY
ng in a synchron
object is sen
peration.
by a
d received by all devices
The identifier of the SYNC object is by default set to 0x80 and has thus a very high priority within the
Can network. No data bytes are transferred with the SYNC.
The SYNC
The supe
SYNC signal; for
e (in µs
object
omm nication
Period" 1
85