Rockwell Automation 1794-IT8,D17946.5.7 Thermocouple/Millivolt Input Module User Manual
Page 32
4–6
Writing Configuration to and Reading Status from your Module with a Remote I/O Adapter
Publication 1794-6.5.7 – April 1997
Description
Decimal Bit
(Octal Bit)
Word
Write Word 0
00–01 (00–01)
Module Data Type
Bit
01
00
Definition
0
0
o
C (default)
0
1
o
F
1
0
Bipolar counts scaled between –32768 and +32767
1
1
Unipolar counts scaled between 0 and 65535
Bit 02 (02)
Fixed Digital Filter – 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 times the selected first notch filter time shown on page 4–3.
(Default – filter disabled.)
03–05 (03–05)
A/D Filter First Notch Frequency
Bit
05
04
03
Definition
0
0
0
10Hz (default)
0
0
1
25Hz
0
1
0
50Hz
0
1
1
60Hz
1
0
0
100Hz
1
0
1
250Hz
1
1
0
500Hz
1
1
1
1000hZ
06 (06)
Calibration High/Low bit – This bit is set during gain calibration; reset during offset calibration.
07 (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 8
corresponds to channel 0, bit 9 to channel 1, and so on.