Specifications

Profibus DP Configuration Example for MELSEC System Q
2 - 18
MITSUBISHI ELECTRIC
Next, add the GSD files for the MELSEC STlite series to your project (Import Task -> Add GSD files).
Configure a slave station with the STL-PB1 and the STlite I/O modules in the order listed above. Again,
leave all default settings unchanged.
After wiring the Profibus DP network, downloading the configuration to the PLC and starting the
Profibus DP communication (set Y0 of the master module QJ71PB92V to "1"), you can monitor the
data transfer in the Device Monitor of GX Works2.
As can be seen in the above picture, the input respectively output data of one analog module channel
is spread across two data registers. This is very unfavourable for the programming. The reason for this
is the single byte occupied by each of the digital I/O modules.
Fig. 2-12: Slave configuration
Fig. 2-13: Allocation of the input and output data for this example
Slot 1: STL-DI8-V1
Slot 4: STL-AD2-V (Channel 1)
Slot 4: STL-AD2-V (Channel 2)
Not used
Slot 2: STL-DO4
Slot 3: STL-DA4-V1 (Channel 1)
Slot 3: STL-DA4-V1 (Channel 2)
Slot 3: STL-DA4-V1 (Channel 3)
Slot 3: STL-DA4-V1 (Channel 4)
Not used