Rockwell Automation 1794-XXXX FLEX I/O High-Density Analog Modules - Manual (Page 82)

Publication 1794-UM062A-EN-P - September 2012
74 Module Programming
The two’s complement of 0 is not found, since no first ”1” is ever encountered in
the number. The two’s complement of 0 then is still 0.
Analog Data Format The data returned from the analog-to-digital converter in the module is 12-bit
resolute. This value is left-justified into a 16-bit field, reserving the most
significant bit for a sign bit.
Current and Voltage Mode Values
Current (mA) 4…20 mA Mode 0…20 mA Mode Voltage (V) ± 10V Mode 0…10V Mode
Input Output
-10.50 8000 8000
0.00 0000 -10.00 8620 8618
1.00 0618 -9.00 9250 9248
2.00 0C30 -8.00 9E80 9E78
3.00 1248 -7.00 AAB0 AAA8
4.00 0000 1860 -6.00 B6E0 B6D8
5.00 0787 1E78 -5.00 C310 C310
6.00 0F0F 2490 -4.00 CF40 CF40
7.00 1696 2AA8 -3.00 DB70 DB70
8.00 1E1E 30C0 -2.00 E7A0 E7A0
9.00 25A5 36D8 -1.00 F3D0 F3D0
10.00 2D2D 3CF0 0.00 0000 0000 0000
11.00 34B4 4310 1.00 0C30 0C30 0C30
12.00 3C3C 4928 2.00 1860 1860 1860
13.00 43C3 4F40 3.00 2490 2490 2490
14.00 4B4B 5558 4.00 30C0 30C0 30C0
15.00 52D2 5B70 5.00 3CF0 3CF0 3CF0
14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
11 10 09 08 07 06 05 04 03 02 01 00
S
S
14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
10 09 08 07 06 05 04 03 02 01 00
S
S
14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
11 10 09 08 07 06 05 04 03 02 01 00
0*
A/D unipolar data
A/D bipolar data
D / A d a t a
Output
Input
A n a l o g v a l u e
A n a l o g v a l u e
A n a l o g v a l u e
* = A l w a y s p o s i t i v e xxxxx