Spectrum Controls 1746sc-NI8u User Manual
Page 58
46
SLC 500
™
Universal Analog Input Module
The channel status can be analyzed bit by bit. In addition to providing
information about an enabled or disabled channel, each bit’s status (0 or 1)
tells you how the input data from the analog sensor connected to a
specific channel will be translated for your application. The bit status also
informs you of any error condition and can tell you what type of error
occurred.
The status word definitions for channels 0 through 3 do not include the
RTD or resistance support that is provided by channels 4 through 7. The
charts on the following pages provide a bit by bit examination of the
respective status words.
Table 4.5
Channel 0-7 Status Word (I:e.0 through
I:e.7) - Bit Definitions
Channel 3:0
15 14 13 12 11 10 9 8
7 6 5
4 3 2 1 0
Channel
Channel disabled
0
Status
Channel enable
1
4 to 20 mA
0
0
0
0
0
0 to 20 mA
0
0
0
0
1
± 0.05 V
0
0
0
1
0
± 0.10 V
0
0
0
1
1
± 0.50 V
0
0
1
0
0
± 2.0 V
0
0
1
0
1
0 to 5 V
0
0
1
1
0
Input
1 to 5V
0
0
1
1
1
Type
0 to 10V
0
1
0
0
0
±10V
0
1
0
0
1
Thermocouple Type J
0
1
0
1
0
Thermocouple Type K
0
1
0
1
1
Theromcouple Type T
0
1
1
0
0
Thermocouple Type E
0
1
1
0
1
Thermocouple Type R
0
1
1
1
0
Thermocouple Type S
0
1
1
1
1
Thermocouple Type B
1
0
0
0
0
Thermocouple Type N
1
0
0
0
1
Invalid
1
0
0
1
x
Invalid
1
0
1
x
x
Invalid
1
1
0
x
x
Invalid
1
1
1
0
x
Thermocouple Type C
1
1
1
1
0
CJC temperature
1
1
1
1
1
Engineering Units x1
0
0
Data
Engineering Units x10
0
1
Format
Scaled for PID
1
0
Proportional counts
1
1
Zero on open circuit
0
0
Open
Max. on open circuit
0
1
Circuit
Min. on open circuit
1
0
Disabled
1
1
Channel
10 Hz input filter
0
0
filter
50 Hz input filter
0
1
freq.
60 Hz input filter
1
0
250 Hz input filter
1
1
Open circuit
No error
0
Open circuit detected
1
Under range
No error
0
error
Under range condition
1
Over range
No error
0
error
Over range condition
1
Channel
No error
0
error
Channel error
1