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Rockwell Automation 1771-IL/B , D17716.5.91 ISOLATED ANALOG INPUT Module User Manual

Page 30

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Module Configuration

Chapter 4

4-6

Set appropriate bits in the BTW data file to enable the RTS mode. You can
select RTS periods ranging from 50 ms to 3.1 seconds in increments of
100ms for the 1771-IL/B. Refer to Table 4.E below for actual bit settings.
Note that the default mode of operation is implemented by placing all
zeroes in bits 11 through 15 (13 through 17 octal).

Table 4.E
Examples of Bit Settings for the Real Time Sample Mode

Decimal Bits

15

14

13

12

11

m

m P

Octal Bits

17

16

15

14

13

Sample Time Period

0

0

0

0

0

No RTS, Default settings: 50ms

0

0

0

0

1

100ms

0

0

0

1

0

200ms

0

0

0

1

1

300ms

0

0

1

0

0

400ms

0

0

1

0

1

500ms

0

0

1

1

0

600ms

0

0

1

1

1

700ms

0

1

0

0

0

800ms

0

1

0

0

1

900ms

0

1

0

1

0

1.0s

0

1

1

1

1

1.5s

1

0

1

0

0

2.0s

1

1

0

0

1

2.5s

1

1

1

1

0

3.0s

1

1

1

1

1

3.1s