# Communication between Master (PLC) and Slave (VAT-Valve)

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Ping Pong Rx’ and ‘Pink Pong Tx’ bits are listed in Table 8 and Table 12. The diagram below on Figure bellow shows visually the exchanging between the master (PLC) and the slave (VAT Controller)

Figure - Communication Master-Slave: Ping Pong Rx and Tx bits