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Rockwell Automation 1771-IFF/A,D17716.5.116 FAST ANALOG INPUT MODULE User Manual

Page 65

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7-3

Publication 1771Ć6.5.116 - May 1996

Description

Decimal Bit

(Octal Bit)

Word

Word22

Bits 00-15

(00-17)

Gain calibration results bits - Each bit represents a channel. After a

calibration BTW has been sent, the module confirms calibration by

echoing back the channels that were calibratedduring the gain

calibration BTW. In differential mode, channels 09 thru 16 are zero.

Word23

Bits 00-15

(00-17)

Time Stamp- This wordis a 1ms counter to timestamp the Block

Transfer Read. You can subtract the time stamp of 1 BTR from

another to findthe difference. The counter is a 15Ćbit rolling counter,

which counts from 0 to 32767, andthen rolls over to 0.

Word24

Bits 00-15

(00-17)

Scan Time - This wordcontains the rate at which the inputs are being

updated.

Table 12.B

Input Range Selection

Voltage input

Current input

1

1 to 5V d c

4 to 20mA

0 to 5V d c

0 to 20mA

1

-5 to +5V dc

-20 to +20mA

2

-10 to +10V dc

2

0 to 10V dc

1

Current input mode selected by configuration plug.

2

Configurable using bi-polar scaling.