Rockwell Automation 1761-NET-DNI DeviceNet Interface (DNI) - Manual (Page 30)

Publication 1761-UM005B-EN-P - October 2006
30 DNI Configuration Parameters and Programming Notes
The first byte (byte 0) of the first word contains the status byte and is
not available to the user.
Input Split Point
The Input File Size within the DNI is configurable from 1…32 words.
The Input Split Point defines how much data is configured as
Master/Slave I/O and how much data is configured for explicit
assembly messaging.
Input Size Sample Data Array
Word Input Image
Series A Series B
0 0 Data (8 bits) Status
1 1 Data Most Significant Byte
(MSB) Data Least Significant
Byte (LSB)
2 2 Data MSB Data LSB
3 3 Data MSB Data LSB
↓ ↓ ↓ ↓
14 30 Data MSB Data LSB
15 31 Data MSB Data LSB
TIP
Byte 1 (MSB) of word 0 is available for user data.
TIP
For information on the Status Byte (byte 0), see the
Status Byte section on page 50.
Input Split Point Parameter Definition
Parameter
Type Paremeter Number Description Range Default
Value
Series A Series B
I/O n/a 2 Input Split Point 1…32 1
IMPORTANT
The Input Split Point parameter cannot be used with
DNI Series A.