Rockwell Automation 1794-IRT8XT FLEX I/O Thermocouple/RTD /Millivolt Input Module User Manual - Manual (Page 46)

Publication 1794-6.5.12 - September 2011
34 Read and Write Configuration Maps for the FLEX I/O Module
Word Dec. Bits
(Octal Bits) Description
Read Word 10 00…07
Extended data table data response 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
Bit/Word Descriptions for Block Transfer Write Words
Word Dec. Bits
(Octal Bits) Description
Write Word 0 00…02 Input Filter Selection bits
Bit
02 01 00 Filter Time Constants – actual filtering depends on the module mode of
operation
0 0 0 Hardware filtering only (default filtering)
0 0 1 25 ms
0 1 0 100 ms
0 1 1 250 ms
1 0 0 500 ms
1 0 1 1s
1 1 0 2 s
1 1 1 5 s
Bits 03…05
Reference Junction
– used when input type is set to thermocouple and sensor mode is set to
internal compensation. Sets a fixed reference junction to compensate all thermocouple channels.
Bit
05 04 03 Reference Junction
0
0 0 0 °C (32 °F)
0 0 1 20 °C (68 °F)
0 1 0 25 °C (77 °F)
0 1 1 30 °C (86 °F)
1 0 0 40 °C (104 °F)
1 0 1 50 °C (122 °F)
1 1 0 60 °C (140 °F)
1 1 1 70 °C (158 °F)
Bits 06…07 Fault Mode bits – when a bit is set (1), fault mode is enabled for that channel. Bit 06 corresponds to
channels 0…3; bit 07 corresponds to channels 4…7.
0 = Disabled
1 = Enable wire-off detection
Bits 08…11
(10…13)
Data format – module defaults to -4000…10000 in millivolt mode, and 0…5000 in Ω mode with
implied decimal points (i.e. -40.00mV, 0.1 Ω ) whenever °C, °F, °K is selected.