Isdu Blocking And Non-Blocking Methods; Single Command Blocking - Emerson RSTi-OM User Manual

RSTi-OM User Manual
GFK-3212A
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13.3.2

ISDU Blocking and Non-Blocking Methods

The IOLM supports both blocking and non-blocking ISDU requests. The following diagrams
demonstrate how each mode works.

Single Command Blocking

Figure 101: Illustrates the Single Command Blocking Method
Functionality Descriptions
The parameter address of the data object in the IO-Link
UINT
device
The data element address of a structured parameter of
UINT
the data objects in the IO-Link device.
Length of data that was read or written.
UINT For nested batch commands, the data length can vary
from 1 to fixed data area size.
Data returned for read commands. Contains the data of a
An array of
write command.
USINTs,
The size of the array is determined by the Control field in
UINTs, or
RdWrControlType.
UDINTs
Note: Data field not required for single NOP commands.
Section 13
Jun 2021
142