Range Selection; Input Scaling - Allen-Bradley 1794-IT8 User Manual

4–2 Writing Configuration to and Reading Status from your Module with a Remote I/O Adapter

Range Selection

Input Scaling

Publication 1794-6.5.7 – April 1997
Individual input channels are configurable to operate with the
following sensor types:
Sensor Type
Voltage Millivolt
Thermocouple r ocoupl Type B
Type E
Type J
Type K
Type R
Type S
Type T
Type N
Type C
Type L
You select individual channel ranges using write words 1 and 2 of
the block transfer write instruction.
Scaling lets you report each channel in actual engineering units.
Scaled values are in integer format.
Input Type Range
Millivolt –76.50 to +76.50mV
o
Type B 300 to 1800 C
o
Type E –230 to 1000 C
o
Type J –195 to 1200 C
o
Type K –230 to 1372 C
o
Type R –50 to 1768 C
o
Type S –50 to 1768 C
o
Type T –195 to 400 C
o
Type N –270 to 1300 C
o
Type C 0 to 2315 C
o
Type L –175 to 800 C
o
Type B 572 to 3272 F
o
Type E –382 to 1832 F
o
Type J –319 to 2192 F
o
Type K –382 to 2502 F
o
Type R –58 to 3214 F
o
Type S –58 to 3214 F
o
Type T –319 to 752 F
o
Type N –450 to 2372 F
o
Type C 32 to 4199 F
o
Type L –283 to 1472 F
Note: In thermocouple mode, scaled number has an implied decimal point 1 digit from the right. For example, if reading is
18000, temperature is 1800.0. In millivolt mode, the implied decimal point is to the left of the last 2 digits. For example, if
reading is 2250, actual reading is 22.50mV
Range
–76.50 to +76.50mV
o
300 to 1800 C
o
–230 to 1000 C
o
–195 to 1200 C
o
–230 to 1372 C
o
–50 to 1768 C
o
–50 to 1768 C
o
–195 to 400 C
o
–270 to 1300 C
o
0 to 2315 C
o
–175 to 800 C
Scaling Maximum Resolution
–7650 to +7650 10µV
o
3000 to 18000 0.1 C
o
–2300 to 10000 0.1 C
o
–1950 to 12000 0.1 C
o
–2300 to 13720 0.1 C
o
–500 to 17680 0.1 C
o
–500 to 17680 0.1 C
o
–1950 to 4000 0.1 C
o
–2700 to 13000 0.1 C
o
0 to 23150 0.1 C
o
–1750 to 8000 0.1 C
o
5720 to 32720 0.1 F
o
–3820 to 18320 0.1 F
o
–3190 to 21920 0.1 F
o
–3820 to 25020 0.1 F
o
–580 to 32140 0.1 F
o
–580 to 32140 0.1 F
o
–3190 to 7520 0.1 F
o
–4500 to 23720 0.1 F
o
320 to 41990 0.1 F
o
–2830 to 14720 0.1 F