Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual User Manual
Page 63
2–43
How Communication Takes Place and I/O Image Table Mapping
Publication 1794ĆUM057B-EN-P - November 2001
Definition
Decimal Bit
(Octal Bit)
Word
Write Word 5
Bit 13 (15)
Transparent bit (TR). - This bit, when set to 1, permits configuration to be
changed without using the IC bit.
Bit 14 (16)
Set to 1.
Bit 15 (17)
Initiate Configuration bit (IC). - When set (1), instructs the module to enter
configuration mode. Present configuration data prior to or coincident with IC
being set. Once IC returns to 0, the configuration is applied and any subquent
configuration information is ignored until IC is toggled.
Write Words 6,
7 and 8
Bits 00-15
(00-17)
Not used
4 Output Isolated Analog Module (1794ĆOF4I) Image Table
Mapping
Module Image
I/O Image
Read Back Channel 0
Read Back Channel 1
Read Back Channel 2
Read Back Channel 3
Input Size
Output Size
1 to 9 Words
0 to 6 Words
PU FP CF
BD DN
Channel Configuration
IC
R V QK CK GO
Channel #
Set to 0
EN
Hold Outputs
WireĆoff
S1 S0
Output Data Channel 0
Output Data Channel 1
Output Data Channel 2
Output Data Channel 3
1
Q3 Q2 Q1 Q0
Not Used
Not Used
TR IT
Isolated Analog Output Module (1794-OF4I) Read
Word/Dec. Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Word/Octal Bit
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Read Word 1
Read Back Channel 0
Word 2
Read Back Channel 1
Word 3
Read Back Channel 2
Word 4
Read Back Channel 3
Word 5
PU FP
CF
0
Reserved
0
0
0
0
0
BD DN
0