Rockwell Automation 1756-OF8I ControlLogix Eight-channel Isolated Analog I/O Modules - Manual (Page 189)

Rockwell Automation Publication 1756-UM540A-EN-P - May 2014 189
Isolated Analog I/O Module Tag Definitions Appendix A
Output Tags
The following table describes the Output tags associated with the
1756-IRT8I module.
Table 25 - 1756-IRT8I Module - Output Tags
Tag Name Size 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 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