Rockwell Automation 1746-NI8 SLC 500 Analog Input Modules User Manual - Manual (Page 55)

5–14 Channel Configuration, Data, and Status
Publication 1746Ć6.8 - April 1997
Open Circuit Error (Bit 12)
The open circuit error bit is set (1) whenever the channel detects an
open circuit condition at its input. The open circuit error is active for
the 4–20 mA input type only. The open circuit error state will
always take precedence over the out-of-range error states. There will
never be an out-of-range error when an open circuit is detected. The
open circuit error bit is cleared when the channel is disabled or when
the open circuit condition is removed.
OverĆRange Error (Bit 13)
The over-range error bit is set (1) whenever a configured channel
detects an over-range condition for the channel data. An over-range
condition exists when the input value is above the specified upper
limit of the particular sensor connected to that channel. The
over-range bit is cleared when the channel is disabled.
UnderĆRange Error (Bit 14)
The under-range error bit is set (1) whenever a configured channel
detects an under-range condition for the channel data. An
under-range condition exists when the input value is below the
specified lower limit of the particular sensor connected to that
channel. The under-range bit is cleared when the channel is
disabled.
Configuration Error (Bit 15)
The configuration error bit is set (1) whenever a configured channel
detects that the channel configuration word is not valid. All other
status bits reflect the settings from the configuration word (even
those settings that may be in error). The configuration error bit is
cleared when the channel is disabled.