Mitsubishi Electric MELSEC iQ-R Series User Manual page 32

■Operation of a data assurance
Identity of data per slave station is assured as follows.
Ex.
To assure data of the remote stations with the number of occupied stations of 3 and 1
CPU module
Device
Station No.1
·
Data assured
station No.3
Data assured
Station No.4
■Precautions
• When using station-based block data assurance, set the refresh devices in the module parameter. If the refresh devices are
not set, the remote input (RX), remote output (RY), and remote register (RWr, RWw) of the buffer memory may not be
refreshed.
• When station-based block data assurance is used, transmission delay time and link refresh time become longer than those
of when station-based block data assurance is not used. When designing a system based on an existing system, check the
transmission delay time and link refresh time at startup of the system. ( Page 169 Processing Time)
Integrity of 32-bit data in remote register (RWr and RWw) is assured even if station-based block data
assurance is not set. (Assurance of 32-bit data) ( Page 29 32-bit data integrity assurance)
1 FUNCTIONS
30
1.1 Cyclic Transmission
Master/local module
Station No.1
·
station No.3
Link refresh
Station No.4
Remote station Remote station
(station No.: 1, (station No.: 4,
number of occupied number of occupied
stations: 3) stations: 1)
Station No.1
·
station No.3
Station No.4