Instruction Manual

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 3210
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 0001 0
± 0.10 V 0001 1
± 0.50 V 0010 0
± 2.0 V 0010 1
0 to 5 V 0011 0
Input 1 to 5V 0011 1
Type 0 to 10V 0100 0
±10V 0100 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 1001 x
Invalid 101x x
Invalid 110x x
Invalid 1110 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