Mitsubishi FX3U-32DP, User Manual

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31
FX
3U
-32DP PROFIBUS-DP Interface Block
User’s Manual
5 Communication Outline on PROFIBUS-DP Network
5.2 Acyclic Input/Output Data Communication
1
Int
roduct
ion
2
Specifi
cations
3
Inst
al
lati
on
4
Wi
rin
g
5
C
omm.
Out
lin
e on
PRO
FIB
US-
D
P
Ne
two
rk
6
B
uff
er M
em
ory
Al
loc
ati
on
7
Para
mete
r S
ett
ing
an
d N
etw
or
k
C
onf
igu
rat
ion
8
E
xam
ple
P
rogr
am
9
D
iagnos
tics
5.2 Acyclic Input/Output Data Communication
Acyclic I/O data communication is available for changing DP-Slave parameters during cyclic communication.
The allowable data size is a maximum of 140Byte. Cyclic Communication has a higher priority than Acyclic
Communication. Acyclic Communication is always processed in the Data Consistency Mode.
→
For flag allocations, refer to Chapter 6
→
For details on Acyclic Input-Send/Output-Receive Area, refer to Chapter 6
DP Slave DP Slave
DP Master
PROFIBUS-DP Network
DP Slave
Input-Send Area for
Acyclic Data
Communication
Output-Receive Area
for Acyclic Data
Communication
FX
3U
-32DP
Buffer Memory
Read *2
Write
*1
TO or WBFM applied instructions,
directly specifying BFMs
FROM or RBFM applied instructions,
directly specifying BFMs
*1
*2
FX
3G
/FX
3GC
/
FX
3U
/FX
3UC
/
FX5U/FX5UC PLC