Product Description XI/ON - Eaton Automation

XI/ON: Gateways for Modbus TCP 9 Appendix
Figure 84:
Process output
data
Process output data (PDout)
The field output data is transferred from the XN-1SSI module to the
connected field device.
The process output data is the data that is output from the PLC to
the XN-1SSI module via a gateway.
This is transferred in an 8 byte format as follows:
4 bytes are used for representing the data that is to be written to
the register with the address specified at REG_WR_DATA.
1 byte contains the register address for the data that is to be
read with the next response telegram.
1 byte contains the register address of the data to be written to
bytes 0 to 3 of this telegram and a write request.
1 byte is used for controlling the comparison operations.
1 byte contains a Stop bit for interrupting communication with
the encoder.
206 M001973-01, 07/2007