Mitsubishi Electric L26CPU-BT User Manual page 296

Remark
By enabling "Block Data Assurance per Station", the consistency of the cyclic data for each device station can be
guaranteed. (
*1 Data of more than one station are not guaranteed.
Also, to configure an interlock in the program, do so by using remote I/O (RX/RY) as shown below.
Sending station (master station)
1)
1)The send/receive command (M0) turns ON.
2)Data of D0 to D3 are stored in W100 to W103 (RWw0 to RWw3).
3)Upon completion of storage in W100 to W103, Y1000 (RY0) for handshake turns ON.
4)By cyclic transmission, remote output (RY) data are sent following the remote register (RWw) data, and the receiving
station's X1000 (RX0) is turned ON.
5)Data of W0 to W3 (RWr0 to RWr3) are stored in D100 to D103.
6)Upon completion of storage in D100 to D103, Y1000 (RY0) for handshake turns ON.
7)When the receiving station's Y1000 turns ON, the sending station's Y1000 turns OFF.
8)When the sending station's Y1000 turns OFF, the receiving station's Y1000 turns OFF.
*2 Even if the number of occupied stations is two or more, the consistency of the cyclic data for each device station can be
guaranteed by performing handshaking with one bit of remote I/O (RX/RY). The interlocks for all occupied stations (in
units of 4 words) are not necessary.
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Page 159, Section 8.2.9)
2)
3)
7)
*1
Receiving station (local station)
1) 4)
5)
6)
8)
*2
*2