Comtrol IO-Link Master EIP-4 - Manual (Page 108)

108 - Chapter 7. SLC/PLC-5/MicroLogix Interface IO-Link Master EtherNet/IP Reference Manual: 2000589 Rev. A
Process Data (PDI and PDO) Access via PCCC Messages
- The PDO data from one or more ports may be read with one message. (That is, if addressing Port 1,
N11:0, ports one to four may be read in one message.)
- Partial PDI and PDO data reads are allowed.
- The length of the Read message can range from 1 to the total, configured PDI or PDO length for all
ports starting at the addressed port.
• Controller Write (Output) access:
- Only PDO data may be written.
- The PDO data for one or more ports may be written with one message.
- Partial PDO data writes are not allowed.
- The length of the Write message must be equal to the total of the configured PDO lengths for all ports
to be written. The one exception is that the data length of the last port to be written must be equal to
or greater than the device PDO length for that port.