Cyclic Data Integrity Assurance - Mitsubishi Electric RD77GF8 User Manual

Cyclic data integrity assurance

This function assures the cyclic data integrity in units of 32 bits or station-based units.
: Assured, : Not assured
Method
32-bit data assurance
Station-based block data
*1
assurance
Interlock program
*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.
CPU module
Device
0H
2 words
(32 bits)
1H
2H
2 words
(32 bits)
3H
4H
2 words
(32 bits)
5H
6H
2 words
(32 bits)
7H
1 FUNCTIONS
26
1.3 Cyclic Transmission
Description
Assures data in 32-bit units.
Data is automatically assured by satisfying
assignment conditions of link devices.
Assures data in station-based units.
Data is assured by enabling the station-based
block data assurance in the parameter setting.
Assures data of more than 32 bits.
Data is assured by configuring interlocks on
programs.
Link refresh
Availability
Link refresh



Simple Motion module
RWr, RWw
2 words
(32 bits)
2 words
(32 bits)
2 words
(32 bits)
2 words
(32 bits)
Direct access to Access to buffer
link devices memory
 
 
 