Rockwell Automation 1771-DA,D17716.5.13 U MNL 1771-DA ASCII I/O MODULE - Manual (Page 71)

Choosing Module Features
Chapter 3
3Ć29
Record features that apply to your ASCII device by writing a 0 or 1 in
corresponding bits IW1(10-17) using the form (found at the end of this
chapter) or the boxes below.
IW1
Bit Number
17 16 15 14 13 12 11 10
Communciation rate code
Number of Data Bits: 0=8, 1=7
Parity: 0=Odd, 1=Even
Parity Enable: 0=No, 1=Yes
Stop Bits: 0=one, 1=two
ACK/NAK: 0=No, 1=Yes
Select the number of initialization words for transfer to the ASCII module
after deciding which of the module features are required for your ASCII
device and application. You select module features by setting bits in four
initialization words. Set the number of initialization words equal to the
highest numbered initialization word used. For example, if you need a
feature found in word four, you must select all four initialization words.
Number of Words Code
Word 1 00
Words l and 2 01
Words 1, 2, and 3 10
Words 1, 2, 3, and 4 11
Review your selections of module features. Record the code for the
number of initialization words that you need in IW1(00-01). Use the form
(found at the end of this chapter) or the boxes below.
IW1
Initialization
Words
01 00
Number of
Selecting the Number of
Initialization Words, IW1(00Ć01)