Mitsubishi FX3U-32DP, User Manual

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37
FX
3U
-32DP PROFIBUS-DP Interface Block
User’s Manual
6 Buffer Memory Allocation
6.2 Cyclic I/O Data Area Compatible with FX0N-32NT-DP [BFM #0 to BFM #19]
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
*1. BFM#500 to 502 are Read Only.
*2. BFM#900 to 902 are Read Only.
*3. BFM#1301 to 1308 are Read Only.
Note
• Do not access the "Not Available" BFMs with FROM/TO instructions. Accessing BFMs that are not
available may cause operation errors in the 32DP.
• Do not write to the "Read Only" BFMs with TO instructions.
INPUT/OUTPUT to where?
When this manual references INPUT/OUTPUT for communication data on the PROFIBUS-DP network, it
refers to data from the DP-Master's point of view. Therefore, CYCLIC INPUT DATA means THE CYCLIC
DATA STREAMING FROM DP-SLAVE TO DP-MASTER. On the other hand, ACYCLIC OUTPUT DATA, for
example, means THE ACYCLIC DATA STREAMING FROM DP-MASTER TO DP-SLAVE.
6.2 Cyclic I/O Data Area Compatible with FX
0N
-32NT-DP [BFM #0 to BFM #19]
BFM Access : Read / Write
The 32DP allocates Byte1 - 40 of Cyclic Output Data by the FROM instruction to the Cyclic Output Data
Receive Area (BFM#300 to #371), while it allocates Byte1 - 40 of Cyclic Input Data by the TO instruction to
the Cyclic Input Data Send Area (BFM#100 to #171).
*1
*1. These redundant allocations are implemented for compatibility to the FX
0N
-32NT-DP. Regardless of
the data amount, it is recommended for most users to refer to the Cyclic Input/Output Data Receive/
Send Area (BFM#100 to #171/BFM#300 to 371).
BFM#773 to
BFM#898
Not Available
− − −
BFM#899 Acyclic Input Data Send Flag (Class2)
3 3
6.30
BFM#900 to
BFM#972 Acyclic Input Data Send Area (Class2)
Max. 140 Byte
3
3
*2
6.31
BFM#973 to
BFM#1098
Not Available
− − −
BFM#1099 Acyclic Output Data Read Flag (Class2)
3 3
6.32
BFM#1100 to
BFM#1172 Acyclic Output Data Receive Area (Class2)
Max. 140 Byte
3
−
6.33
BFM#1173 to
BFM#1297
Not Available
− − −
BFM#1298 Reset Extended Diagnostic/Alarm Data Area Flag 3 3 6.34
BFM#1299 Alarm/Status Switch 3 3 6.35
BFM#1300 Diagnostic/Alarm Immediate Send Flag 3 3 6.36
BFM#1301 to
BFM#1325
Diagnostic/Alarm(Status) Data Area
3
3
*3
6.37
BFM No. Description
BFM Access
Reference
Read Write
FROM Instruction Access
BFM Content TO Instruction Access
BFM Content
Writing to BFM #100
Writing to BFM #101
Writing to BFM #119
BFM #0
#1
#19
Copied from BFM #300
Copied form BFM #301
Copied from BFM #319
BFM #0
#1
#19