Rockwell Automation 1794-IRT8XT FLEX I/O Thermocouple/RTD /Millivolt Input Module User Manual - Manual (Page 45)

Publication 1794-6.5.12 - September 2011
Read and Write Configuration Maps for the FLEX I/O Module 33
Read Word 3 00…15
(00…17)
Channel 3 Input data
Read Word 4 00…15
(00…17)
Channel 4 Input data
Read Word 5 00…15
(00…17)
Channel 5 Input data
Read Word 6 00…15
(00…17)
Channel 6 Input data
Read Word 7 00…15
(00…17)
Channel 7 Input data
Read Word 8 00…07 Underrange bits – these bits are set if the input
signal is below the minimum range of the input
channel.
Bit 00 corresponds to channel 0…bit 07 corresponds
to channel 7.
08…15
(10…17)
Overrange bits – these bits are set if 1), the input
signal is above the maximum range of the input
channel; or 2), an input is disconnected.
Bit 08 (10) corresponds to channel 0, bit 09 (11)
corresponds to channel 1, and so on.
Read Word 9 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 f ault
0 1 1 1 EEPROM fault
0001, 0100, and 0011…1111 Reserved for
factory use
04 Series of Unit (SAB) – 0 = Series A, 1 = Series B
05…06
Cold junction compensation fault bits
– These
bits are set (1) when the corresponding cold junction
compensator lead is broken, unattached or shorted,
and the thermocouple is set to "external
compensation.” 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, and so on.