Mitsubishi Electric RD77GF16, Руководство пользователя

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26
1 FUNCTIONS
1.3 Cyclic Transmission
Cyclic data integrity assurance
This function assures the cyclic data integrity in units of 32 bits or station-based units.

: Assured,

: Not assured
*1 When the software version of the Simple Motion module is "Ver.01":
The set parameter is ignored in the Simple Motion module and operate as "Disable". Assure data using interlock programs as required.
When the software version of the Simple Motion module is "Ver.02" or later:
To enable data assurance in an asynchronous station, read/write data by direct access in the inter-module synchronous interrupt
program (I44) without using a link refresh.
When there is a remote device station in the network, use station-based block data assurance. If it is disabled,
the functions of the remote device station cannot be assured.
32-bit data assurance
The RWr and RWw data can be assured in 32-bit units.
■
Data assurance at the time of direct access to link devices
When link refresh target devices are accessed, the integrity of 32-bit data can be assured by satisfying the following
conditions.
• The start device No. of RWr, RWw is multiples of 2.
• The number of points assigned to RWr, RWw is multiples of 2.
Method Description Availability
Link refresh Direct access to
link devices Access to buffer
memory
32-bit data assurance Assures data in 32-bit units.
Data is automatically assured by satisfying
assignment conditions of link devices.
  
Station-based block data
assurance
*1
Assures data in station-based units.
Data is assured by enabling the station-based
block data assurance in the parameter setting.   
Interlock program Assures data of more than 32 bits.
Data is assured by configuring interlocks on
programs.   
0H
1H
2H
3H
4H
5H
6H
7H
RWr, RWw
2 words
(32 bits)
Simple Motion module
Device
CPU module
Link refresh
2 words
(32 bits)
2 words
(32 bits)
2 words
(32 bits)
2 words
(32 bits)
2 words
(32 bits)
2 words
(32 bits)
2 words
(32 bits)