Rockwell Automation AB quality Allen-Bradley 1746-INT4 User Manual page 47

Channel Configuration Word (O:e.0 through O:e.3) — Bit Descriptions
Bit or Define To Select
Bits
0...3 Input TC Type J
Type
TC Type K
TC Type T
TC Type E
TC Type R
TC Type S
TC Type B
TC Type N
±50 mV
±100 mV
TC Type C
TC Type D
Invalid
Invalid
Invalid
CJC Temp
4, 5 Data Engr. Units x1
Format
Engr. Units x10
Scaled-for-PID
Counts
6, 7 Open- Zero
circuit
Upscale
Mode
Downscale
Invalid
8 Units Degrees C
°F, °C
Degrees F
Set these bits in the Channel Configuration Word
15...12 11 10 9 8 7 6 5 4 3 2 1 0
0 0
0 1
1 0
1 1
0
1
Channel Configuration, Data, and Status
Description
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
Configure the channel for the
0 1 0 1
input type connected to it. Valid
0 1 1 0 inputs are thermocouples and analog
input signals of ±50 mV and ±100 mV.
0 1 1 1
You can configure the channel to read
1 0 0 0
the cold-junction (CJC) temperature.
1 0 0 1 When reading the CJC temperature,
the channel ignores the physical input
1 0 1 0
signal.
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
0 0 Select the channel data format
from: Engineering units (EU) x1 or
0 1
x10. For EU x1, values are in 0.1
1 0
degrees or 0.01 mV. For EU x10,
1 1
values are in whole °C or °F or
0.1 mV. Scaled-for-PID (value is
the same for any input type).
Proportional input signal range is
scaled to 0...16,383 counts.
Proportional counts (value is
same for any input type).
Proportional input signal range is
scaled to ±32,767 counts. For more
information, refer to page 49.
Select module response to a
detected open-circuit from: Zero
to force the channel data word to
zero. Upscale to force the channel
data word to full scale. Downscale
to force channel data word to low
scale. Important: A bit selection or
1 1 is invalid. For an open CJC
thermistor, mV channels are not
affected. Important: The module
requires 500 ms or one module
update to flag the error while it
ramps the channel input.
Select °C/°F for thermal inputs.
Ignored for mV inputs. Important: For
EU x1 and °F (0.1 °F), an over-range
error occurs above 3276.7 °F (cannot
exceed 32767 counts).
Publication 1746-UM614B-EN-P - September 2007
47