Comtrol IO-Link Master EIP-4 - Manual (Page 107)

IO-Link Master EtherNet/IP Reference Manual: 2000589 Rev. A Chapter 7. SLC/PLC-5/MicroLogix Interface - 107
Process Data (PDI and PDO) Access via PCCC Messages
7.4. Process Data (PDI and PDO) Access via PCCC Messages
The process data has been grouped together in order to minimize the number of PCCC messages required to
interface to the IO-Link Master. The PDI and PDO data for multiple ports can be received or transmitted by
one message.
PCCC Read/Write Access where:
• All PDI data can be read with one PCCC read message.
• All PDO data can be read with one PCCC read message.
• All PDO data can be written with one PCCC write message.
• Controller Read access:
- The PDI data from one or more ports may be read with one message. (That is, if addressing Port 1,
N10:0, ports one to four may be read in one message.)
File
Number
Controller
Port 1 Access
Controller
Port 2 Access
Controller
Port 3 Access
Controller
Port 4 Access
Read
(Input)
Write
(Output)
Read
(Input)
Write
(Output)
Read
(Input)
Write
(Output)
Read
(Input)
Write
(Output)
Read
(Input)
Process
Data
Input
N10:0
(Port 1)
N20:0
(Port 2)
N30:0
(Port 3)
N40:0
(Port 4)
Read
(Input)
Process
Data
Output
N11:0
(Port 1)
N21:0
(Port 2)
N31:0
(Port 3)
N41:0
(Port 4)
Write
(Output)
Process
Data
Output
N12:0
(Port 1)
N22:0
(Port 2)
N32:0
(Port 3)
N33:0
(Port 4)