Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual User Manual
Page 46
Publication 1794-UM064B-EN-P - May 2014
34 Communicate With Your Module
1794-IT8 Word/Bit Description
Word
Dec. Bits
(Octal Bits)
Description
Write Word 0
00…01
Module Data Type
Bit
01
00
Definition
0
0
°C (default)
0
1
°F
1
0
Bipolar counts scaled between -32768…32767
1
1
Unipolar counts scaled between 0…65535
02
Fixed Filter Enable – When this bit is set (1), a software digital filter is enabled. This filter settles to 100%
of a Full Scale step input in 60 scans.
03…05
Notch Frequency
Bit
05
04
03
0
0
0
10 Hz (default)
0
0
1
25 Hz
0
1
0
50 Hz
0
1
1
60 Hz
1
0
0
100 Hz
1
0
1
250 Hz
1
1
0
500 Hz
1
1
1
1000 Hz
06
Gain Offset Calibration – This bit is set during gain calibration/ reset during offset calibration.
07
Calibration Clock – This bit must be set to 1 to prepare for a calibration cycle; then reset to 0 to
initiate calibration.
08…15 (10…17)
Calibration Mask – The channel, or channels, to be calibrated will have the correct mask bit set. Bit 0
corresponds to channel 0, bit 1 to channel 1, and so on.
Write Word 1
00…03
Channel 0 Thermocouple Type
Bit
03
02
01
00
Thermocouple Type – Range
0
0
0
0
Millivolts (default)
0
0
0
1
B 300...1800 °C (572...3272 °F)
0
0
1
0
E -270...1000 °C (-454...1835 °F)
0
0
1
1
J -210...1200 °C (-346...2192 °F)
0
1
0
0
K -71...1372 °C (-95...2502 °F)
0
1
0
1
R -50...1768 °C (-58...3214 °F)
0
1
1
0
S -50...1768 °C (-58...3214 °F)
0
1
1
1
T -73...400 °C (-99...752 °F)
1
0
0
0
C 0...2315 °C (32...4199 °F)
1
0
0
1
N -270...1300 °C (-450...2372 °F)