Remote I/O data exchange
Data is exchanged/updated in two ways:
- Discrete data is updated automatically in every network scan. Data movement is defined from the perspective of the PLC (RIO scanner):
- Input (or RIO Read): movement of data from the terminal (adapter) to the PLC (scanner)
- Output (or RIO Write): movement of data from the PLC (scanner) to a terminal (adapter)
- Block Transfer operations allow the exchange of up to 64 words of data between the PLC (RIO scanner) and the terminal (RIO adapter) based on instruction from the PLC ladder program. Block Transfer operations are:
- Block Transfer Read (BTR): moves data from the terminal (adapter) to the PLC (scanner)
- Block Transfer Write (BTW): moves the data from the PLC (scanner) to a terminal (adapter)
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