Other Precautions - Mitsubishi Electric Melsec Q Series User Manual
Profibus-dp master module
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7
PROGRAMMING
7.8.2 Other precautions
When programming for the QJ71PB92V on a MELSECNET/H remote I/O station, pay
attention to the following.
(1) QJ71PB92V I/O signals
I/O signals of the QJ71PB92V are refreshed into link devices (LX/LY) on the remote I/
O station and then transferred to the remote master station.
Make the link devices (LX/LY) of the remote master station refreshed into the devices
(X/Y) of the QCPU and use them in sequence programs.
(2) QJ71PB92V buffer memory
Use MELSECNET/H dedicated instructions (REMFR/REMTO instructions) for reading
from or writing to the buffer memory of the QJ71PB92V.
After execution of the REMFR/REMTO instruction, several scans are required until
read/write of actual data is completed.
For details on the REMFR/REMTO instructions, refer to the Q Corresponding
MELSECNET/H Network System Reference Manual (Remote I/O network).
7.8 Program Example When Mounting the QJ71PB92V on a MELSECNET/H Remote I/O Network
7.8.2 Other precautions
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