Rockwell-automation AADvance Controller Demo Unit Instrukcja Użytkownika Pobierz pdf (Strona 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.

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Rockwell-automation AADvance Controller Demo Unit Instrukcja Użytkownika Strona 93