Rockwell Automation 1756-IF4FXOF2F ControlLogix High-speed Analog I/O Module - Manual (Page 52)

52 Rockwell Automation Publication 1756-UM005B-EN-P - January 2013
Chapter 3 Module Features
Input Channel Status Word Bits
Table 10 defines the Input Channel Status word bits.
Table 10 - Input Channel Status Word Bit Description
Bit Name Description
Bit 8 I.In[x].ChanFault This bit matches the state of I.InxFault bits (0-3) in the Channel Fault word, except
when a communication fault occurs. If a communication fault occurs between the
module and its owner-controller, the I.InxFault bit is set but this bit is not set.
Bit is set if one of the following events occurs:
• The module is being calibrated.
• An underrange condition exists on input channel.
• An overrange condition exists on input channel.
Bit 7 I.In[x].CalFault Bit is set if an error occurs, and is not corrected, during calibration for that channel.
Bit 6 I.In[x].Underrange Bit is set when the input signal at the channel is less than or equal to the
minimum detectable signal.
Bit 5 I.In[x].Overrange Bit is set when the input signal at the channel is greater than or equal to the
maximum detectable signal.
Bit 4 I.In[x].RateAlarm Bit is set when the input channel’s rate of change exceeds the configured Rate
Alarm parameter. It remains set until the rate of change drops below the
configured rate. If latched, the alarm will remain set until it is unlatched.
Bit 3 I.In[x].LAlarm Bit is set when the input signal moves beneath the configured Low Alarm limit. It
remains set until the signal moves above the limit. If latched, the alarm remains
set until it is unlatched. If a deadband is specified, the alarm also remains set as
long as the signal remains within the configured deadband.
Bit 2 I.In[x].HAlarm Bit is set when the input signal moves above the configured High Alarm limit. It
remains set until the signal moves below the limit. If latched, the alarm remains
set until it is unlatched. If a deadband is specified, the alarm also remains set as
long as the signal remains within the configured deadband.
Bit 1 I.In[x].LLAlarm Bit is set when the input signal moves beneath the configured Low-Low Alarm
limit. It remains set until the signal moves above the limit. If latched, the alarm
remains set until it is unlatched. If a deadband is specified, the alarm also remains
latched as long as the signal remains within the configured deadband.
Bit 0 I.In[x].HHAlarm Bit is set when the input signal moves above the configured High-High Alarm
limit. It remains set until the signal moves below the limit. If latched, the alarm
remains set until it is unlatched. If a deadband is specified, the alarm also remains
latched as long as the signal remains within the configured deadband.