Allen-Bradley DeviceNet 1761-NET-DNI, User Manual, Page: 42 / 101

1761-6.5
5-8 DNI Configuration Parameters and Programming Notes
Output Size
This parameter identifies the size, in words, of the data array that will be
written to the controller attached to the DNI’s RS-232 port. The array may
contain up to 16 (16-bit) words of data for DNI Series A (32 words for DNI
Series B) from a contiguous block within the attached controller.
The first byte (byte 0) of the first word contains the status byte and is not
available to the user. A sample of the data array is shown below:
Parameter
Type
Parameter Number Description Range Default Value
Series A Series B
I/O 8 6 Output Size Series A: 1 to 16
Series B: 1 to 32
1
Important:
For DNI Series B, you must also configure the Output Split
Point. See page 5-9.
Word Output 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
Note:
Byte 1 (MSB) of word 0 is available for user data.
Note:
For information on the Status Byte (byte 0), see the Status Byte
section on page 5-23.