Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules - Manual (Page 85)

Publication 1794-6.5.8 - January 2010
Communication and I/O Image Table Mapping with the DeviceNet/ControlNet Adapter 85
Word 5 Bit 12 (14) Interrupt Toggle bit (IT) – This bit, when set (1), permits interleaving of
module interrupts ensuring exchange of critical data when channels are
configured for their fastest update times. RTSI and “no low pass filter” must
be 0 in order for the module to recognize this feature. This groups data update
rates for all channels to the slowest configuration setting of any of the
channels. In addition, channel update rates for all channels with a 7.5ms
update rate are reduced to 5.0ms. When reset (0), real time sampling and
filter features are enabled.
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.
Words 6, 7 and 8 Bits 00-15
(00-17) Not used.
(1) For changes in tag values like the CH bit in the IF4ICFXT to take effect, the tag either must be included in a ladder rung or or a configuration download
forced using the configuration tab in the RSLogix GUI.
Table 5.6
Word/Bit Descriptions for the 1794-IF4I Isolated Analog Input Module
Word Decimal Bit
(Octal Bit) Definition