Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 62)

2–42 How Communication Takes Place and I/O Image Table Mapping
Publication 1794ĆUM057B-EN-P - November 2001
Definition
Decimal Bit
(Octal Bit)
Word
Write Word 3 Channel Configuration (refer to Configuring Your Input Channel )
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
Write Word 4 Bits 00-14
(00-16)
Real TimeSampleInterval - Programs the interval of the real time sample.
Can be varied from 0 to 30 seconds (30000 decimal). Resolution is in ms with
granularity in 5ms steps.
Bit 15 (17) Not used. Set to 0.
Write Word 5 Bit 00-03 Channel calibration selection bit. When this bit is set (1), the channel can
be calibrated using the calibration clock bit (CK). Bit 00 corresponds to input
channel 0, bit 01 corresponds to input channel 1, it 02 corresponds to input
channel 2, bit 03 corresponds to input channel 3
Bit 04 Gain/Offset selection bit (GO). - When this bit is cleared, a 0 to 1 to 0
transition of the CK bit performs on offset calibration. When this bit is 1, the
module is directed to do a gain calibration.
Bit 05 Calibration clock bit (CK). - When this bit is set to 1 (calibration mode), the
calibration coeffiicient for the selected channels is accepted. When this bit is
reset (0), the accepted calibration coefficients for the selected channels are
stored, applied, and the calibration mode exited. Monitor status bits DN and
BD for succesful calibration.
Bit 06 Quick Calibration bit (QK). - Normally reset (0). When this bit is set (1)
during a calibration sequence, the calibration coefficient is stored to all
related configurations for the selected channels. NOTE: This method of
calibration quickly calibrates the selected channels, however you will not be
within the rated accuracy of the module.
Bit 07 Revert to defaults bit (RV). - Normally reset (0). When set (1) during a
calibration procedure, default values for selected channels are used for the
calibration coefficient.NOTE: You will not be within the rated accuracy of the
module.
Bit 08-11
(10-14)
Not used. Set to 0.
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.