Lenze · E94AYCER communication module (PROFINET®) · Communication Manual · DMS 11.0 EN · 04/2016 · TD17
59
9
Parameter data transfer
9.1
The acyclic channel (PROFIdrive profile)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
9.1.2
Acyclic data transmission process
[9-2]
Data communication via the acyclic channel
• A "Write.req" is used to transmit the data set (DB47) in the form of a parameter request to the
I/O device.
• "Write.res" confirms the receipt of the message by the I/O controller.
• The I/O controller requests the response of the I/O device with "Read.req".
• The I/O device responds with a "Read.res (-)" if processing is not yet completed.
• After parameter processing, the parameter request is completed by transmitting the parameter
response in the form of a "Read.res (+)" to the I/O controller.
E94YCER011
Wri
t
e
.
re
s
w
i
t
h da
t
a
(p
ara
m
e
t
er re
qu
e
st)
w
i
t
h da
t
a
(p
ara
m
e
t
er re
spo
n
s
e
)
w
i
t
h
out
da
t
a
w
i
t
h
out
da
t
a
w
i
t
h
out
da
t
a
w
i
t
h
out
da
t
a
Read
.
re
q
Read
.
re
s (-)
Read
.
re
q
Read
.
re
s (+)
P
ara
m
e
t
er re
spo
n
s
e
P
ara
m
e
t
er re
qu
e
st
P
ara
m
e
t
er re
qu
e
st
P
ara
m
e
t
er
p
r
o
ce
ss
in
g
P
ara
m
e
t
er re
spo
n
s
e
IO
contro
ll
er
IO
device
Wri
t
e
.
re
q (DB47)
