Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules User Manual
Page 59
Publication 1794-6.5.8 - January 2010
Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter 59
Table 4.4
Word/Bit Descriptions for the 1794-IF4I Analog Input Module
Read Word
Decimal Bit
(Octal Bit)
Definition
Word 0
Bits 00-15
(00-17)
Channel 0 analog data – Real time input data per your
configuration
Word 1
Bits 00-15
(00-17)
Channel 1 analog data – Real time input data per your
configuration
Word 2
Bits 00-15
(00-17)
Channel 2 analog data – Real time input data per your
configuration
Word 3
Bits 00-15
(00-17)
Channel 3 analog data – Real time input data per your
configuration
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
Bits 02
Calibration Bad bit (BD). – This bit is set to 1 if the channel
calibration
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
calibration mode is selected (bit 15, word 5 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.
Word 6
Bits 00-03
Underrange bits (U). – These bits are set (1) when the input
channel is below a preset limit as defined by the configuration
selected. U0 (bit 00) corresponds to input channel 0 and U1 (bit
01) corresponds to input channel 1, etc. Refer to Table 4.B.
Bits 04-07
Overrange bits (V). – These bits are set (1) when the input
channel is above a preset limit as defined by the configuration
selected. Bit 04 corresponds to input channel 0 and bit 05
corresponds to input channel 1, etc. Refer to Table 4.8.
Bits 08–15
(10-17)
Not used. Set to 0.