Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 90)

Publication 1746-UM614B-EN-P - September 2007
90 Channel Configuration Worksheets
6, 7 Open-
circuit
Mode Zero 0 0 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.
Upscale 0 1
Downscale 1 0
Invalid 1 1
8 Units
°F, °C Degrees C 0 Select °C/°F for thermal inputs.
Ignored for mV inputs. Important: For
EU x1 and °F (0.1 °F), an over-range
error will occur above 3276.7 °F
(cannot exceed 32,767 counts).
Degrees F 1
9, 10 Unused Unused 0 0 These bits must be zero for a
valid configuration.
11 Chnl
Enable Channel Off 0 Disable unused channels for
faster response. When set, the
module configures the channel and
reads the channel input before
setting bit 11 in the status word. If
you change the configuration word,
the status word must reflect the
change before new data is valid. If
you clear the configuration word, the
module clears channel and status
words. For a new configuration word,
channel data and status words
remain cleared until the module sets
this bit (11) in the status word.
Channel On 1
12…15 Unused Unused 0000 These bits must be zero for a
valid configuration.
Enter Your Bit Selections >> 0000 For the Channel Configuration
Word
Channel Configuration Word (O:e.0 through O:e.3) — Bit Descriptions (Continued)
Bit or
Bits Define To Select Set these bits in the Channel Configuration Word Description
15…12 11 10 9 8 7 6 5 4 3 2 1 0