Rockwell Automation 1797-OE8 FLEX Ex Analog Modules User Manual User Manual
Page 32
Publication 1797-6.5.1 - May 2005
2-16 Understanding Configurable FLEX Ex Analog Module Features
Table 2.11 Data Format - Write Words 0 and 1
Table 2.12 Error Level 0.1mA Steps
Analog Output Module (1797-OE8) Image Table Mapping
Table 2.13 Input Map (Read Words)
Bits
Description
Word 0
04 03 02 01 Data format for channels 0-3
Word 1
04 03 02 01 Data format for channels 4-7
0
0
0
0
0-22mA, w/error steps (default)
0
0
0
1
0-22mA = 0 to 110%, w/error steps
0
0
1
0
0-22mA = 0 to 104.8%, square root, w/error steps
0
0
1
1
0-22mA = 0 to 65,535, unsigned integer, w/error steps
0
1
0
0
2-22mA, w/error steps
0
1
0
1
2-22mA = -12.5% to 112.5%, w/error steps
0
1
1
0
4-22mA = 0 to 106%, square root, w/error steps
0
1
1
1
4-20mA = 0 to 65,535, unsigned integer, w/error steps
1
0
0
0
Not assigned
1
0
0
1
Not assigned
1
0
1
0
Not assigned
1
0
1
1
0-22mA = A/D count, w/fixed error
1
1
0
0
3.6-21mA = NAMUR NE 43, w/fixed error
1
1
0
1
3-21mA = -6.25 to 106.28% w/fixed error
1
1
1
0
2-22mA = -12.5 to 112.5% w/fixed error
1
1
1
1
Not assigned
Bits
Description
Word 0
13 12 11 10 9
Error level channels 0-3
Word 1
13 12 11 10 9
Error level channels 4-7
0
0
0
0
0
Disabled
0.1mA * step value = remote fault alarm threshold
Examples
Data
Format
2-22mA
-12.5 to
112.5%
0
0
1
1
1
Step value = 7, 0.1mA * 7 = 0.7mA
Remote fault alarm at -4.38% or +104.38%
0
1
1
1
1
Binary value = 15, 0.1mA * 15 = 1.5mA
Remote fault alarm at -9.38% or + 109.38%
Bit
→
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Word
↓
0
Flt
Alm
ch7
Flt
Alm
ch6
Flt
Alm
ch5
Flt
Alm
ch4
Flt
Alm
ch3
Flt
Alm
ch2
Flt
Alm
ch1
Flt
Alm
ch0
Diagnostic Status
1
Res
Flg
MODULE Command Response
MODULE Response Data
Where: ch = channel
Flt Alm = Fault Alarm
Res Flg = Response Flag