Rockwell Automation Publication 1756-UM540E-EN-P - December 2017 195
Analog I/O Module Tag Definitions Appendix A
Ch[x].LLAlarmUnlatch BOOL Unlatches a latched Low Low Alarm at the first instance of
the bit transitioning from 0 to 1.
For example, if the controller sends data for this tag in
successive instances as 0, 1, 1, 1, 1, the module unlatches
the Low Low alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the Low Low alarm unlatching.
• 0 = LLAlarm remains latched
• 1 = LLAlarm unlatches
Ch[x].LAlarmUnlatch BOOL Unlatches a latched Low Alarm at the first instance of the
bit transitioning from 0 to 1.
For example, if the controller sends data for this tag in
successive instances as 0, 1, 1, 1, 1, the module unlatches
the Low alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the Low alarm unlatching.
• 0 = Low Alarm remains latched
• 1 = Low Alarm unlatches
Ch[x].HAlarmUnlatch BOOL Unlatches a latched High Alarm at the first instance of the
bit transitioning from 0 to 1.
For example, if the controller sends data for this tag in
successive instances as 0, 1, 1, 1, 1, the module unlatches
the High alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the High alarm unlatching.
• 0 = High Alarm remains latched
• 1 = High Alarm unlatches
Ch[x].HHAlarmUnlatch BOOL Unlatches a latched High High Alarm at the first instance
of the bit transitioning from 0 to 1.
For example, if the controller sends data for this tag in
successive instances as 0, 1, 1, 1, 1, the module unlatches
the High High alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the High High alarm unlatching.
• 0 = High High Alarm remains
latched
• 1 = HHAlarm unlatches
Ch[x].RateAlarmUnlatch BOOL Unlatches a latched Rate Alarm at the first instance of the
bit transitioning from 0 to 1.
For example, if the controller sends data for this tag in
successive instances as 0, 1, 1, 1, 1, the module unlatches
the Process alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the Process alarm unlatching.
• 0 = Rate Alarm remains latched
• 1 = Rate Alarm unlatches
Ch[x].Calibrate BOOL Initiates the Calibration process.
This tag must remain set until a valid Low Reference and
High Reference values are applied to the channel.
• 0 = Calibration process is
not started
• 1 = Calibration process is started
Ch[x].CalLowReference BOOL Rising edge triggers the Low Calibration at the Low
Reference Point for the current InputRange tag value.
A valid Low Reference signal must be connected to the
channel before setting this tag.
• 0 = Do not sample the Low
Reference Calibration Point.
• 1 = Sample the Low Reference
Calibration point on rising edge.
Ch[x].CalHighReference BOOL Rising edge triggers a High Calibration at the High
Reference Point for the current InputRange tag value.
A valid High Reference signal must be connected to the
channel before setting tag.
• 0 = Do not sample the High
Reference Calibration Point.
• 1 = Sample the High Reference
Calibration point on rising edge.
Ch[x].SensorOffset REAL Compensates for any known error on the sensor or
channel to which the sensor is connected.
Any
(We recommend that you use a
small value in the channel’s
operating range.)
0.0
= default
Table 33 - 1756-IRT8I Module - Output Tags (continued)
Tag Name Data Type Definition Valid Values
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