Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules User Manual
Page 72
Publication 1794-6.5.8 - January 2010
72 Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter
Table 4.17
Word/Bit Descriptions for the 1794-IF2XOF2I Isolated Analog Combo Module Read
Write Word
Decimal Bit
(Octal Bit)
Definition
Word 0
Bits 00–15
(00–17)
Input Channel 0 input data – Real time input data per your configuration
Word 1
Bits 00–15
(00–17)
Input Channel 1 input data – Real time input data per your configuration
Word 2
Bits 00–15
(00–17)
Read Back Output Channel 0 – During normal operation, it is a copy of the output of
channel 0. During an EN transition, it is the condition of the output as determined by S1
and S0. Note: Read back data is an image of what the user has sent as output to the
module; no checks are performed on the data.
Word 3
Bits 00–15
(00–17)
Read Back Output Channel 1 – During normal operation, it is a copy of the output of
channel 1. During an EN transition, it is the condition of the output as determined by S1
and S0. Note: Read back data is an image of what the user has sent as output to the
module; no checks are performed on the data.
Word 4
Bits 00–15
(00–17)
Real Time Sample. The elapsed time in increments programmed by the real time
sample interval.
Word 5
Bits 00
Reserved
Bits 01
Calibration Done bit (DN). – This bit is set to 1 after a calibration cycle is completed.
Bits 02
Calibration Bad bit (BD). – This bit is set to 1 if the channel calibration coefficients
cannot be saved or read properly.
Bits 03-07
Set to 0.
Bits 08-11
(10-12)
Reserved
Bit 12 (14)
Set to 0
Bit 13 (15)
Configuration mode bit (CF) – This bit is set (1) when the configuration mode is
selected (bit 15, word 6 in the block transfer write set to 1). When this bit is set (1), the
module status indicator flashes.
Bit 14 (16)
Field Power Off bit (FP) – This bit is set (1) when the 24V field power fails. When this
bit is set (1), the module status indicator flashes.
Bit 15 (17)
Power Up (unconfigured state) bit (PU). – This bit is set (1) when the configuration
word is all zeroes (0) due to a reset (adapter power cycle or module insertion) or a
cleared configuration word (all 0). When this bit is set (1), the module status indicator
flashes.