1761-6.5
DNI Configuration Parameters and Programming Notes
5-3
Input Size
This parameter identifies the size, in words, of the data array that is read
from 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 4 1 Input Size Series A: 1 to 16
Series B: 1 to 32
1
Important:
For DNI Series B, you must also configure the Input Split
Point. See page 5-4.
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
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.
AB Parts
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