Mitsubishi FX3U-32DP, User Manual

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32
FX
3U
-32DP PROFIBUS-DP Interface Block
User’s Manual
5 Communication Outline on PROFIBUS-DP Network
5.2 Acyclic Input/Output Data Communication
5.2.1 Acyclic Data Consistency
Acyclic Data Communication is always processed in the Data Consistency Mode, regardless of the BFM#98
or BFM#298 settings. The 32DP supports Class 1 and 2 Acyclic Communication.
→
For details on Acyclic Communication related flags, refer to Chapter 6
Acyclic Input Data Communication
Acyclic Output Data Communication
*1. For Class 1: To prevent an "Acyclic Class 1 Response Timeout," the response time must be smaller
than 10 seconds.
For Class 2: The "Acyclic Class 2 Response Timeout" will be set by the Initiate-request
(SendTimeout value) from the DP-Master.
Note : 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.
Class1 Acyclic Input Data Send
Flag (BFM#499)
Writing data to the acyclic Input
Data Send Area (Class1)
(BFM#500 to #572)
ON
Write
Set ON automatically by FX
3U
-32DP if
Input Data can be written by user
Must be set OFF by user program
after writing of all Input Data
:
:
Able to write to the 32DP's Acyclic Input
Data Send Area for this duration
*1
ON
Read
Class1 Acyclic Output Data Read
Flag (BFM#699)
Reading data from the Acyclic
Output Data Receive Area (Class1)
(BFM#700 to #772)
Able to read from the 32DP's Acyclic Output
Data Receive Area for this duration
*1
Set ON automatically by FX
3U
-32DP if
Output Data can be read by user
Must be set OFF by user program
after reading of Output Data
:
: