Mitsubishi FX3U-32DP, User Manual

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FX
3U
-32DP PROFIBUS-DP Interface Block
User’s Manual
6 Buffer Memory Allocation
6.29 Acyclic Output Data Receive Area (Class1) [BFM #700 to #772]
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6.29 Acyclic Output Data Receive Area (Class1) [BFM #700 to #772]
BFM Access : Read Only
This is a data storage area for acyclic output data from the DP-Master. This area stores a maximum of
140Byte acyclic output data.
→
For details on Acyclic Communication, refer to Section 5.2
6.30 Acyclic Input Data Send Flag (Class2) [BFM #899 Bit0]
BFM Access : Read / Write
The 32DP turns this flag ON automatically when new acyclic input data can be written to the Acyclic Input
Data Send Area. Acyclic Communication always requires data consistency. After the writing process is
finished, the user must turn this flag OFF.
→
For details on Acyclic Communication, refer to Section 5.2
→
For details on the data consistency mode, refer to Section 5.1
6.31 Acyclic Input Data Send Area (Class2) [BFM #900 to #972]
BFM Access : Read / Write
This is a data storage area for acyclic input data, bound to be transferred to the DP-Master. This area stores
a maximum of 140 Byte acyclic input data.
→
For details on Acyclic Communication, refer to Section 5.2
6.32 Acyclic Output Data Read Flag (Class2) [BFM #1099 Bit0]
BFM Access : Read / Write
The 32DP turns this flag ON automatically when new acyclic output data is available in the Acyclic Output
Data Receive Area. Acyclic Communication always requires data consistency. After the communication
process is finished, the user must turn this flag OFF.
→
For details on Acyclic Communication, refer to Section 5.2
→
For details on the data consistency mode, refer to Section 5.1
BFM No. Name Description Access
BFM #700 Slot Number
Number of the slot whose data has been sent by DP-Master. This
number is defined by the addressing for acyclic services.
(Only Slot 0 possible, must be set by the DP-Master)
Read Only
BFM #701 Index
Indicates the index of the data being sent.
Only Index 144 possible, must be set by the DP-Master
Read Only
BFM #702 Length
Length of the received data (size of Data in Byte).
The valid range is 0 to 140.
Read Only
BFM #703
to #772
Data Acyclic User Output Data received from the DP-Master. Read Only
BFM No. Name Description Access
BFM #900 Slot Number
Number of the slot whose data has been read. This number is defined by
the addressing for acyclic services.
(Only Slot 0 possible, must be set by the DP-Master)
Read Only
BFM #901 Index
Indicates the index of the data being sent.
(Only Index 144 possible, must be set by the DP-Master)
Read Only
BFM #902 Length
Length of the data to be written (size of Data in Byte).
The valid range is 0 to 140.
Read Only
BFM #903
to #972
Data Acyclic User Input Data to be sent to the DP-Master. Read/Write