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MELSEC-Q
1 OVERVIEW
1.2 QJ71PB92D Features
(1) Operates as a PROFIBUS-DP master (class 1) station.
(2) Makes possible the exchange of input and output data to and from the slave
station without the need to be aware of the PROFIBUS-DP protocol by using I/O
signals X/Y and the buffer memory.
(3) Supports 3M, 6M, 12M [bps] network communication speeds in addition to the
9.6k, 19.2k, 93.75k, 187.5k, 500k, and 1,500k [bps] supported by the
QJ71PB92D. These can be selected using a configurator.
(4) Trouble information can be read from the slave station using the I/O signal X/Y
and the buffer memory.
(5) The global control function makes it possible to maintain all slave I/O at the same
time. In addition, this can also be canceled.
(6) The module contains a self-diagnosis function that can be used to test the
hardware such as the internal memory.
(7) The upper and lower bytes of I/O data can be swapped on the buffer memory.
When word data is handled, these bytes need not be swapped using the
sequence program.
(8) For data transmission between the PLC CPU and buffer memory of QJ71PB92D,
the automatic refresh setting and dedicated instruction are used to prevent I/O
data from being separated .
: The data of specified sizes are not matched with each other.
(9) Even when a plurality of PLC CPU modules are installed through the multi-CPU
system, this model can be controlled by any PLC CPU module.
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