Channel configuration – Rockwell Automation 1746-NR4 SLC 500 RTD/Resistance Input Module/ Instructions User Manual
Page 16
16 SLC 500™ RTD/Resistance Input Module
Publication 1746-IN012B-EN-P - May 2001
Channel Configuration
Once the module is installed, each channel can be configured to establish the way
the channel will operate. You configure the channel by entering bit values into the
configuration word using your programming software. Channels 0 through 3 on the
NR4 are configured by entering bit values into output words 0 through 3
respectively. Output words 4 through 7 are used to further define the channel
configuration to allow you to choose a scaling format other than the module default
when using the proportional counts format. You can use words 4 and 5 to define
one user-set range. Use words 6 and 7 to define a second range. See the table
below for a bit-by-bit examination of the configuration word.
To Select
Make these bit settings
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
In
put
T
yp
e
100
Ω
Pt 385
0
0
0
0
200
Ω
Pt 385
0
0
0
1
500
Ω
Pt 385
0
0
1
0
1000
Ω
Pt 385
0
0
1
1
100
Ω
Pt 3916
0
1
0
0
200
Ω
Pt 3916
0
1
0
1
500
Ω
Pt 3916
0
1
1
0
1000
Ω
Pt 3916
0
1
1
1
10
Ω
Cu 426
(1)
1
0
0
0
120
Ω
Ni 618
(2)
1
0
0
1
120
Ω
Ni 672
1
0
1
0
604
Ω
NiFe 518
1
0
1
1
150
Ω
1
1
0
0
500
Ω
1
1
0
1
1000
Ω
1
1
1
0
3000
Ω
1
1
1
1
D
ata
F
orm
at
Engineering Units 1
(3)
0
0
Engineering Units
10
(4)
0
1
Scaled-for-PID
1
0
Raw/Proportional
1
1
Br
ok
en
In
pu
t
Set to Zero
0
0
Set to Upscale
0
1
Set to Downscale
1
0
Invalid
1
1
Te
mp
er
at
ur
e
Un
it
s
(5
)
°C
0
°F
1