Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules - Manual (Page 95)

Publication 1794-6.5.8 - January 2010
Communication and I/O Image Table Mapping with the DeviceNet/ControlNet Adapter 95
Word 6 Bits 00-01 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
Bits 02-03 Wire-Off status bits. (W). – These bits, when set (1), indicate the corresponding
current output channel is open. W0 (bit 02) corresponds to channel 0, and W1 (bit 03)
corresponds to channel 1.
Bits 04-05 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
Bits 06-09
(06-11) Not used. Set to 0.
Bits 10-11
(12-13) Hold output bits (P). – These bits are set (1) in response to Q0 or Q1 and a transition of
the EN bit. When P0 or P1 is set (1), they indicate that the output is holding at the level
in the readback data for the respective channel. These bits return to 0 when the output
data matches the readback output data.
Bits 12-15
(14-17) Not used. Set to 0.
Write Word 1 Bits 00-12
(00-14) 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
Bit 13 = 1, bit 14 = 1 – hold output at its current level
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 2 Bits 00-15
(00-17) Output Channel 0 data. Refer to Table 5.14.
Word 3 Bits 00-15
(00-17) Output Channel 1 data. Refer to Table 5.14.
Word 4 Input Channels 0 and 1 Filter Selections Refer to Table 5.13
Bits 00-01 Channel 0 Filter Setting
Bits 04-07 Channel 1 Filter Setting
Bits 08-15
(11-17) Set to 0.
Word 5 Channel Configuration
Bits 00-03 Input Channel 0 Configuration Refer to Table 5.12
Bits 04-07 Input Channel 1 Configuration Refer to Table 5.12
Bits 08-11
(10-13) Output Channel 0 Configuration Refer to Table 5.14.
Bits 12-15
(14-17) Output Channel 1 Configuration Refer to Table 5.14.
Table 5.15
Word/Bit Descriptions for the 1794-IF2XOF2I Isolated Analog Combo Module
Write Word Decimal Bit
(Octal Bit) Definition