Data first configuration – Rockwell Automation 1771-IFF/A,D17716.5.116 FAST ANALOG INPUT MODULE User Manual
Page 66
7-4
Publication 1771Ć6.5.116 - May 1996
When bits 9 and 10 in block transfer write word 3 are set for “two’s
complement – data first configuration,” the block transfer read will
have the channel data first in the transfer.
Figure 7.2
BlockTransfer Read in Two's Complement - Data First Configuration, SingleĆended
Inputs
Dec. Bits
15 14 13 12 11 10 09 08 07 06 05 04
03
02
01
00
Description
Octal Bits
17 16 15 14 13 12 11 10 07 06 05 04
03
02
01
00
Description
Word 1
Channel 1 Input
Channel 1 Input
2
Channel 2 Input
Channel 2 Input
3
Channel 3 Input
Channel 3 Input
4
Channel 4 Input
Channel 4 Input
⇓
⇓
⇓
⇓
16
Channel 16 Input
Channel 16 Input
17
HF EE CS RTS IS OR PU
Diagnostics
18
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Data underrange for channels 1-16
1
19
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Data overrange for channels 1-16
1
20
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Data polarity for channels 1-16
21
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Offset Calibration Results
22
16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
Gain Calibration Results
23
15Ćbit rolling counter - binary, 1ms resolution
Time Stamp
24
Update rate - binary, to 1
υ
s, with +4
µ
s resolution
Scan Time
Where:
PU = Power up bit
OR= Out of range bit
IS = Invalid scaling bit
RTS = Real time sampling bit
HF = Hardware Fault
EE = EEPROM status bits
CS = Calibration status bits
1
These bits are set (1) at approximately the input range limits selected (Table NO TAG).
Data First Configuration