Product Description XI/ON - Eaton Automation

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XI/ON: Gateways for Modbus TCP 9 Appendix Figure 82: Process output data Process output data Process output data are data which are sent from the PLC via the gateway and the XN-1RS××× module to a connected field device. The data received from the PLC are loaded into the transmitbuffer in the XN-1RS××× module. The transmission is realized in a 8-byte format which is structured as follows: 1 control byte, used to guarantee error free data-transmission. 1 byte containing signals to flush the transmit- and receive buffer. 6 byte user data 196 M001973-01, 07/2007
XI/ON: Gateways for Modbus TCP 9 Appendix Table 69: Meaning of the data bits (process output) Designation Value Meaning RXBUF FLUSH 0 - 1 This bit is used to flush the receivebuffer. If STATRES = 1: The command RXBUF FLUSH = 1 is ignored. If STATRES = 0: RXBUF FLUSH = 1 causes the flushing of the receive-buffer. TXBUF FLUSH 0-1 This bit is used to flush the transmitbuffer. If STATRES = 1: The command TXBUF FLUSH = 1 is ignored. If STATRES = 0: TXBUF FLUSH = 1 causes the flushing of the tranceive-buffer. STATRES 0-1 This bit is set to reset the STAT bit in the process input data. With the change from 1 to 0 the STAT bit is reset (from 0 to 1). If this bit is 0, all changes in TX_BYTE_CNT, TX_CNT and RX_CNT_ACK are ignored. Flushing the transmit-/ receive-buffer with RXBUF FLUSH/ TXBUF FLUSH is possible. If this bit is 1 or with the change from 0 to 1, the flushing of the transmit-/ receive-buffer with RXBUF FLUSH/ TXBUF FLUSH is not possible. M001973-01, 07/2007 197
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Product Description XI/ON - Eaton Automation

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