User Manual

Rockwell Automation Publication 1756-UM540A-EN-P - May 2014 187
Isolated Analog I/O Module Tag Definitions Appendix A
Ch[x].Underrange BOOL Indicates the channel data is beneath the absolute
minimum for this channel.
For example, when the channel operates in the
-100…100 mV input range, the absolute minimum on
the channel is -101.00 mV. If the input signal is -102.00
mV, this tag is set to 1.
• 0 = Channel is not beneath the
absolute minimum
• 1 = Channel is beneath the
absolute minimum
Ch[x].Overrange BOOL Indicates the channel data is above the absolute
maximum for this channel.
For example, when the channel operates in the
-100…100 mV input range, the absolute maximum on
the channel is 101.00 mV. If the input signal is 102.00 mV,
this tag is set to 1.
• 0 = Channel is not above the
absolute minimum
• 1 = Channel is above the
absolute minimum
Ch[x].LLAlarm BOOL Triggered when the I.Ch[x].Data tag value is less than the
C.Ch[x].LLAlarmLimit. tag value
If latched, this tag remains set until unlatched or if the
I.Ch[x].Data tag value is within Deadband
• 0 = Alarm is not triggered
• 1 = Alarm is triggered
Ch[x].LAlarm BOOL Triggered when the I.Ch[x].Data tag value is less than the
C.Ch[x].LAlarmLimit tag value
If latched, this tag remains set until unlatched or if the
I.Ch[x].Data tag value is within Deadband
• 0 = Alarm is not triggered
• 1 = Alarm is triggered
Ch[x].HAlarm BOOL Triggered when the I.Ch[x].Data tag value is greater than
the C.Ch[x].HAlarmLimit tag value
If latched, this tag remains set until unlatched or if the
I.Ch[x].Data tag value is within Deadband
• 0 = Alarm is not triggered
• 1 = Alarm is set
Ch[x].HHAlarm BOOL Triggered when the I.Ch[x].Data tag value is greater than
the C.Ch[x].HHAlarmLimit tag value
If latched, this tag remains set until unlatched or if the
I.Ch[x].Data tag value is within Deadband
• 0 = Alarm is not triggered
• 1 = Alarm is triggered
Ch[x].RateAlarm BOOL Triggered when the absolute change between
consecutive channel samples exceeds the
C.Ch[x].RateAlarmLimit tag value
If latched, this tag remains set until it is unlatched
• 0 = Alarm is not triggered
• 1 = Alarm is triggered
Ch[x].CalibrationFault BOOL Indicates the last attempted Calibration for this
channel failed.
This tag is cleared, that is, set to 0, when power is cycled
to the module.
• 0 = Calibration did not fail
• 1 = Calibration failed
Ch[x].Calibrating BOOL Indicates the channel is currently being calibrated. • 0 = Channel is not being
calibrated
• 1 = Channel is being calibrated
Ch[x].CalGoodLowRef BOOL Indicates that a valid Low Reference signal has been
sampled on this channel.
• 0 = Valid Low Reference signal
has not been sampled on this
channel
• 1 = Valid Low Reference signal
has been sampled on this
channel
Table 24 - 1756-IRT8I Module - Input Tags
Tag Name Size Definition Valid Values