188 Rockwell Automation Publication 1756-UM540E-EN-P - December 2017
Appendix A Analog I/O Module Tag Definitions
Output Tags
The following table describes the Output tags associated with the
1756-IF8I module.
Table 30 - 1756-IF8I Module - Output Tags
Tag Name Data Type Definition Valid Values
Ch[x].LLAlarmEn BOOL Enables the Low Low Process alarm. • 0 = Alarm is disabled
• 1 = Alarm is enabled
Ch[x].LAlarmEn BOOL Enables the Low Process alarm. • 0 = Alarm is disabled
• 1 = Alarm is enabled
Ch[x].HAlarmEn BOOL Enables the High Process alarm. • 0 = Alarm is disabled
• 1 = Alarm is enabled
Ch[x].HHAlarmEn BOOL Enables the High High Process alarm. • 0 = Alarm is disabled
• 1 = Alarm is enabled
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 set 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 set 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 input.
If the tag value transitions to 0 before calibration is
finished, the process stops and calibration fails.
• 0 = Calibration process is
not started
• 1 = Calibration process is started
To Next Page
Loading...
Need help?
General
