Rockwell Automation Publication 1756-UM540E-EN-P - December 2017 207
Analog I/O Module Tag Definitions Appendix A
Ch[x].RampAlarm BOOL Indicates that the channel is currently limited to changing
at the C.Ch[x].MaxRampRate tag value or is latched.
• 0 = Channel is not limited to the
C.Ch[x].MaxRampRate tag value
or latched
• 1 = channel is limited
Ch[x].NotANumber BOOL Indicates that the last value last received for the
O.Ch[x].Data tag was not a number.
• 0 = Last channel data received
was a number
• 1 = Last channel data received
was not a number
Ch[x].InHold BOOL Indicates that the channel is currently holding until the
received O.Ch[x].Data tag value is within 0.1% of the
current I.Ch[x].Data tag value.
• 0 = Channel is not holding
• 1 = Channel is holding
Ch[x].CalibrationFault BOOL Indicates that the channel is not calibrated or the last
attempted calibration for this channel failed.
If the last calibration failed, this tag is cleared, that is, set
to 0, when power is cycled to the module.
• 0 = Calibration did not fail
• 1 = Calibration failure
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 value has been
received on the channel.
• 0 = Valid Low Reference value
has not been received on this
channel
• 1 = Valid Low Reference value
has been received on this
channel
Ch[x].CalBadLowRef BOOL Indicates that invalid Low Reference data has been
received on this channel.
You must correct this condition to successfully calibrate
the module.
If calibration is aborted with an invalid Low Reference
signal, the I.Ch[x].CalibrationFault tag is set for this
channel until a successful calibration is performed or the
module is Reset or RIUP'ed.
• 0 = Invalid Low Reference value
has not been received on this
channel
• 1 = Invalid Low Reference value
has been received on this
channel
Ch[x].CalGoodHighRef BOOL Indicates that a valid High Reference value has been
received on this channel.
• 0 = Valid High Reference value
has not been received on this
channel
• 1 = Valid High Reference value
has been received on this
channel
Ch[x].CalBadHighRef BOOL Indicates that an invalid High Reference value has been
received on this channel.
You must correct this condition to successfully calibrate
the module.
If calibration is aborted with an invalid High Reference
value, the I.Ch[x].CalibrationFault tag is set for this
channel until a successful calibration is performed or the
module is Reset or RIUP'ed.
• 0 = Invalid High Reference value
has not been received on this
channel
• 1 = Invalid High Reference value
has been received on this
channel
Ch
[x].Cal
Successful BOOL Indicates calibration on this channel is complete and the
Calibrating state has been exited.
This tag remains set after valid calibration as long as
connection is open.
• 0 = Calibration was not
successful
• 1 = Calibration was successful
and calibrating state has been
exited.
Ch[x].Data REAL Output Data Echo data in scaled Engineering units. Any positive or negative value.
Determined by how you set the
scaling parameters on the channel.
For more information, see Scaling
on page 32.
Table 39 - 1756-OF8I Module - Input Tags (continued)
Tag Name Data Type Definition Valid Values
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