Rockwell Automation AADvance Controller Demo Unit - Manual (Page 93)

Document: 553850 Issue 1.2: March 2011 5-27
<tagname>.DIS BOOL Discrepancy TRUE: there is a discrepancy in current greater
than 1% between the channels of two modules in
a redundant configuration (†)
<tagname>.CF BOOL Channel fault TRUE: module diagnostics detect a fault in the
channel electronics or firmware (state = 7)
<tagname>.V UINT Voltage Reports the channel voltage at the output
terminals, in units of millivolts and with an
accuracy of ± 500mV (††)
<tagname>.I INT Current Reports the current for the channel in milliamps
and with an accuracy of ± 2mA and ± 10% of
measurement
<tagname>.STA USINT Channel state Reports a state value for the channel:
1 = no vfield
2 = de-energized
3 = no load
4 = energized
5 = short-circuit
6 = field fault
7 = faulted
Note: (†) Discrepancy can only be reported TRUE when two modules are active in a
group. (††) The voltage element cannot report values below 0mV.
The State Variable for Digital Outputs
The state variable for a digital output is an unsigned integer with a value from 1 to 7
representing the following:
1 = no-vfield: the field supply voltage is at or below 18V dc for that channel.
Note: When the state variable is 1, the field voltage (<tagname.V>) is reported as
0mV.
2 = de-energized: the commanded state is FALSE and the channel is de-energized.
3 = no-load: the controller cannot detect a load connected to the channel field wiring,
or the load is below the minimum required channel load of 10mA when commanded
TRUE.
4 = energized: the commanded state is TRUE and the channel is energized.
5 = short-circuit: the controller has detected a short-circuit condition, irrespective of
the channel drive state.
6 = field fault: an external source is driving the channel to an energized state or a
voltage greater than 18V dc, irrespective of the channel drive state.
7 = faulted.