Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules User Manual
Page 67
Publication 1794-6.5.8 - January 2010
Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter 67
1
1
1
0
±10V
offset binary
<0618–F9E8>
<1560–63976>
2.5ms
1
1
1
1
±5V
offset binary
<0618–F9E8>
<1560–63976>
2.5ms
Table 4.12
Range Selection Bits and Real Time Output Update Rate for the 1794-OF4I Isolated Output Module
Table 4.13
Word/Bit Descriptions for the 1794-OF4I Analog Output Module
Write Word
Decimal Bit
(Octal Bit)
Definition
Word 0
Bits 00–14
(00–16)
Not used
Bits 13–14
(15-16)
Safe State Source bits (S1/S0). – When EN is 0, these bits designate the source of
the safe state data.
Bit 13 = 0, bit 14 = 1 – reset outputs to 0V/0mA (used with 1794-ASB/C)
Bit 13 = 1, bit 14 = 1 – hold output at its current level (used with 1794-ASB/C)
Bit 13 = 0; bit 14 = 0 – Safe state data is in output data words
Bit 15 (17)
Output enable bit (EN). – When set (1), the outputs are enabled. This bit must be set
in order for the real time data to appear at the outputs. If this bit is not set (0), the
outputs will be determined by S1/S0.
Word 1
Bits 00–15
(00–17)
Channel 0 output data. – The output data is real time data formatted to the selected
configuration. (This data is also safe state data when directed by S1 and S0.)
Word 2
Bits 00–15
(00-17)
Channel 1 output data. – The output data is real time data formatted to the selected
configuration. (This data is also safe state data when directed by S1 and S0.)
Word 3
Bits 00–15
(00-17)
Channel 2 output data. – The output data is real time data formatted to the selected
configuration. (This data is also safe state data when directed by S1 and S0.)
Word 4
Bits 00–15
(00-17)
Channel 3 output data. – The output data is real time data formatted to the selected
configuration. (This data is also safe state data when directed by S1 and S0.)
Word 5
Channel Configuration (refer to page 4-66)
Bits 00–03
Channel 0 Configuration
Bits 04–07
Channel 1 Configuration
Bits 08–11
(10-13)
Channel 2 Configuration
Bits 12–15
(14-17)
Channel 3 Configuration