Manual

Module Configuration
Chapter 4
4-10
If a write block with all zeroes is written to the module, the default
selections will be:
1 to 5V dc or 4 to 20mA (depends on voltage/current selection jumper)
BCD data format
no real time sampling (RTS)
no digital filter
no scaling
no alarms
Note: Input data is set to 0 until an initial block transfer write is received
by the module.
Figure 4.4
Word Assignments for the Isolated Analog Input Module
(1771-IL series B)Block T ransfer W rite
Decimal Bits 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Octal Bits 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
1
Range Selection Bits for Channels 1 through 8
Word
1
8 7 6 5 4 3 2 1
2 Real Time Sampling
Data
Format
BTW
Format
Digital Filter
3
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
3
Sign bits, maximum scaling values Sign bits, minimum scaling values
4 Channel 1 - minimum scaling
5 Channel 1 - maximum scaling
6 Channel 2 - minimum scaling
7 Channel 2 - maximum scaling
8 Channel 3 - minimum scaling
9 Channel 3 - maximum scaling
10 Channel 4 - minimum scaling
11 Channel 4 - maximum scaling
12 Channel 5 - minimum scaling
13 Channel 5 - maximum scaling
14 Channel 6 - minimum scaling
15 Channel 6 - maximum scaling
16 Channel 7 - minimum scaling
Default Configuration