Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 52)

2–32 How Communication Takes Place and I/O Image Table Mapping
Publication 1794ĆUM057B-EN-P - November 2001
Size 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
Read/Write Words 00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17
RTD Offset
Ch 7
RTD Offset
Ch 6
RTD Offset Ch
5
RTD Offset Ch
4
RTD Offset Ch
3
RTD Offset
Ch 2
RTD
Offset
Ch 1
RTD
Offset
Ch 0
Write 3
EDT command EDT command data Write 4
Bit/Word Definitions for the Block Transfer Words for the TC/RTD/mV
Input Module
Word
Dec. Bits
(Octal Bits)
Description
Read Word 1 00-15 (00-17) Channel 0 Input data
Read Word 2 00-15 (00-17) Channel 1 Input data
Read Word 3 00-15 (00-17) Channel 2 Input data
Read Word 4 00-15 (00-17) Channel 3 Input data
Read Word 5 00-15 (00-17) Channel 4 Input data
Read Word 6 00-15 (00-17) Channel 5 Input data
Read Word 7 00-15 (00-17) Channel 6 Input data
Read Word 8 00-15 (00-17) Channel 7 Input data
Read Word 9 00-07 Underrange bits - these bits are set if the input signal is below the input channel's
minimum range. Bit 00 corresponds to channel 0, bit 01 corresponds to channel 1, etc.
08-15 (10-17) Overrange bits - these bits are set if 1), the input signal is above the input channel's
maximum range, or 2), an open detector is detected. Bit 08 (10) corresponds to
channel 0, bit 09 (11) corresponds to channel 1, etc.
Read Word 10 00-03 Diagnostic bits - represent module configuration and/or hardware errors.
Bit 03 02 01 00
0 0 0 0 Reserved for factory use
0 0 1 0 Improper module configuration
0 1 1 0 RAM fault
0 1 1 1 EEPROM fault
0001, 0100, and 0011 thru 1111 Reserved for factory use
04 Not used.
05-06 Cold junction compensation alarm bits - These bits are set (1) when the
corresponding cold junction compensator lead is broken, unattached or shorted. Bit 05
corresponds to CJC1, and bit 06 to CJC2.
07 Not used
08-15 (10-17) Fault alarm bits - An alarm bit is set (1) when an individual input lead opens (broken,
disconnected). If the alarm is enabled, the channel reads maximum value. Bit 08 (10)
corresponds to input channel 0, bit 09 (11) to channel 1, etc.
Read Word 11 00-07 Extended data table command response data bits - These bits echo the EDT
command data written to the module during calibration.
08-14 (10-16) Extended data table command response bits - These bits echo the EDT command
written to the module during calibration.
15 (17) Reserved for factory use