Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module User Manual - Manual (Page 97)

Publication 1746-UM003A-EN-P
Application Examples 7-5
Configuration setup for bath RTD:
•
channels 1 and 5
•
200
Ω
Platinum RTD (385)
•
display temperature to tenths of a degree Celsius or Fahrenheit
•
zero data word in the event of an open- or short-circuit
•
28 Hz input filter to provide 60 Hz line noise rejection
•
use 1.0 mA excitation current for RTD
•
scaling for 0°C to +60°C
•
define upper and lower temperature limits
Configuration setup for steam RTD:
•
channels 2 and 6
•
1000
Ω
Platinum RTD (385)
•
display temperature to tenths of a degree Celsius or Fahrenheit
•
zero data word in the event of an open- or short-circuit
•
50/60 Hz input filter to provide 60 Hz line noise rejection
•
use 0.25 mA excitation current for RTD
•
scaling for -20°C to +200°C
Configuration setup for chilled H
2
O RTD:
•
channels 3 and 7
•
200
Ω
Platinum RTD (385)
•
display temperature to tenths of a degree Celsius or Fahrenheit
•
zero data word in the event of an open- or short-circuit
•
28 Hz input filter to provide 60 Hz line noise rejection
•
scaling for 0°C to +60°C
•
define upper and lower temperature limits
Table 7.3 Channel Configuration Worksheet (With Settings Established)
Bit Definitions:
Bits 0 through 3 Input Type Select
0000 = 100
Ω
Pt. (385)
0001 = 200
Ω
Pt. (385)
0010 = 500
Ω
Pt. (385)
0011 = 1000
Ω
Pt. (385)
0100 = 100
Ω
Pt. (3916)
0101 = 200
Ω
Pt. (3916)
0110 = 500
Ω
Pt. (3916)
0111 = 1000
Ω
Pt. (3916)
1000 = 10
Ω
Cu (427) (1)
1001 = 120
Ω
Ni (618)
(2)
1010 = 120
Ω
Ni (617)
1011 = 604
Ω
Ni-Fe (518)
1100 = 150
Ω
Potentiometer
1101= 500
Ω
Potentiometer
1110= 1000
Ω
Potentiometer
1111= 3000
Ω
Potentiometer
Bits 4 and 5 Data Format Select
00 = engineering units, x1
(3)
01 = engineering units, x10 (4)
10 = scaled-for-PID (0 to 16383)
11 = proportional counts (-32768 to +32767)
Bits 6 and 7 Broken Input Select 00 = zero 01 = upscale 10 = downscale 11 = Invalid
Bit 8 Temperature Units
Select 0 = degrees Celsius 1 = degrees Fahrenheit
Bits 9 and 10 Filter Frequency Select 00 = 10 Hz 01 = 50 Hz 10 = 60 Hz 11 = 250 Hz
Bit 11 Channel Enable 0 = channel disabled 1 = channel enabled
Bit 12 Excitation Current
Select 0 = 1.0 mA 1 = 0.25 mA
Bit 13 Calibration Enable 0 = enable 1 = disabled
Bits 14 and 15 Lead Res. Enable 00 = always 01 = periodic 10 = disable
(1) Actual value at 0 °C is 9.042
Ω
per SAMA standard RC21-4-1966.
(2) Actual value at 0 °C is 100 Ω per DIN standard.
(3) Values are in 0.1°/step or 0.1
Ω
/step for all resistance input types, except 150
Ω
. For the 150
Ω
resistance input type, the values are in 0.01
Ω
/step.
(4) Values are in 1°/step or 1
Ω
/step for all resistance input types, except 150
Ω
. For the 150
Ω
resistance input type, the values are in 0.1
Ω
/step.