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8 - Chapter 1. EtherNet/IP Interface IO-Link Master EtherNet/IP Reference Manual: 2000589 Rev. A
Data Type Definitions
• Output Process Data blocks that include:
- The active event code to clear ((configurable option)
- The output process data to be sent to the port. This may be
• IO-Link mode: IO-Link device output process data
• I/O Output mode: Output bit status
• ISDU (ISDU) interface:
- Provides single and nested batch read/write capabilities
- Requires use of MSG instructions
- Provides both blocking and non-blocking message capabilities
• Blocking message responses are not returned until all the ISDU command(s) have completed.
• Non-blocking messages return immediately. The PLC must then request the ISDU command(s)
response status until a valid response is returned.
• Web based configuration and diagnostic pages:
- IO-Link interface configuration and diagnostics
- EtherNet/IP interface configuration and diagnostics
• EtherNet/IP interface support for ControlLogix, SLC, MicroLogix, and PLC-5 PLC families.
• Modbus/TCP slave interface.
• Example PLC programs to aid the PLC programmer.
1.1.2. Data Type Definitions
The following data type definitions apply.
Data Type Definitions
BOOL Boolean; TRUE if = 1; False if = 0
USINT Unsigned Short Integer (8 bit)
CHAR Character (8 bit)
SINT Short Integer (8 bit)
UINT Unsigned Integer (16 bit)
INT Signed Integer (16 bit)
UDINT Unsigned Double Integer (32 bit)
DINT Signed Double Integer (32 bit)
STRING Character String (1 byte per character)
BYTE Bit String (8 bit)
WORD Bit String (16 bits)
DWORD Bit String (32 bits)