Rockwell Automation 1756-OF8I ControlLogix Eight-channel Isolated Analog I/O Modules - Manual (Page 196)

196 Rockwell Automation Publication 1756-UM540A-EN-P - May 2014
Appendix A Isolated Analog I/O Module Tag Definitions
Output Tags
The following table describes the Output tags associated with the
1756-OF8I module.
Table 28 - 1756-OF8I Module - Output Tags
Tag Name Size Definition Valid Values
Ch[x].LLimitUnlatch BOOL Unlatches a latched Low Limit 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 Limit alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the Low Limit alarm unlatching. • 0 = Alarm remains latched
(default)
• 1 = Alarm is unlatched
Ch[x].HLimitUnlatch BOOL Unlatches a latched High Limit 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 Limit alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the High Limit alarm unlatching. • 0 = Alarm remains latched
(default)
• 1 = Alarm is unlatched
Ch[x].RampAlarmUnlatch BOOL Unlatches a latched Ramp 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 Ramp alarm when it receives the first 1.
The following instances of this tag value being 1 do not
impact the Ramp alarm unlatching. • 0 = Alarm remains latched
(default)
• 1 = Alarm is unlatched
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 (default)
• 1 = Calibration process is started
Ch[x].CalOutputLowRef BOOL Data value change that transitions the channel to produce
the Low Calibration Reference Point for the current
C.Ch[x].OutputRange tag value. • 0 = Do not output Cal Low
Reference
• 1 = Output Calibration Low
Reference
Do not set his tag and the
CalOutputHighRef tag to 1
simultaneously.