5. Initial Programming
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MODBUS RTU
The first step for the MODBUS RTU configuring, in slave mode, is to include the instance in the
desired COM (COM 1 in this case) by clicking with the right button on the COM and select “Add
Device...”, as shown on Figure 5-4:
Figure 5-4. Adding an Instance
After that, the available protocols for the user will appear on the screen. Define the protocol
configuration mode selecting “MODBUS Symbol RTU Slave”, for symbolic mapping setting or
“MODBUS RTU Slave”, for direct addressing (%Q) and click on Add Device, as depicted on Figure
5-5:
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General