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Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual User Manual

Page 73

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2–53

How Communication Takes Place and I/O Image Table Mapping

Publication 1794ĆUM057B-EN-P - November 2001

Definition

Decimal Bit

(Octal Bit)

Word

Word 4

Input Channels 0 and 1 Filter Selections Refer to Setting the Input Filters

Bits 00-01

Channel 0 Filter Setting

Bits 04-07

Channel 1 Filter Setting

Bit 8-15

(11-17)

Set to 0.

Word 5

Channel Configuration

Bits 00-03

Input Channel 0 Configuration - Refer to Configuring Your Input Channels

Bits 04-07

Input Channel 1 Configuration - Refer to Configuring Your Input Channels

Bits 08-11

(10-13)

Output Channel 0 Configuration - Refer to Configuring Your Input Channels

Bits 12-15

(14-17)

Output Channel 1 Configuration- Refer to Configuring Your Input Channels

Word 6

Bits 00-14

(00-16)

Real Time Sample Interval - 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)

Set to 0.

Word 7

Bit 00-03

Channel calibration selection bit. When this bit is set (1), the channel can be

calibrated using the initiate calibration bit (IC). Bit 00 corresponds to input channel 0,

bit 01 corresponds to input channel 1, it 02 corresponds to output channel 0, bit 03

corresponds to output channel 1

Bit 04

Gain/Offset selection bit (GO). - When this bit is set (1), a reset (0), set (1), reset

(0) pattern of the calibration clock bit (CK) causes a gain calibration to occur. When

this bit is set to 0, a reset (0), set (1), reset (0) pattern of the calibration clock bit (CK)

causes an offset calibration to occur.

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 are stored in the selected channels, 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, you will not be within the rated accuracy of the module.

Word 7

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.

Bits 08-09

(10-11)

Not used. Set to 0.