Rockwell Automation 20B PowerFlex 70, PowerFlex 700 Reference Manual - Manual (Page 89)

Digital Outputs
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013 89
2. The relay changes state because a particular value in the drive has exceeded a
preset limit.
The following drive values can be selected to cause the relay activation:
The balance of these functions require that the user set a limit for the specified
value. The limit is set into one of two parameters: [Dig Out1 Level] and [Dig
Out2 Level] depending on the output being used. If the value for the specified
function (frequency, current, etc.) exceeds the user programmed limit, the
relay will activate. If the value falls back below the limit, the relay will
deactivate.
Notice that the [Dig Outx Level] parameters do not have units. The drive
assumes the units from the selection for the annunciated value. For example, if
the chosen “driver” is current, the drive assumes that the entered value for the
limit [Dig Outx Level] is% rated Amps. If the chosen “driver” is Temperature,
the drive assumes that the entered value for the limit [Dig Outx Level] is
degrees C. No units will be reported to LCD HIM users, offline tools, devices
communicating over a network, PLC’s, etc.
The online and offline limits for the digital output threshold parameters will
be the minimum and maximum threshold value required for any output
condition.
If the user changes the currently selected output condition for a digital output,
then the implied units of the corresponding threshold parameter will change
with it, although the value of the parameter itself will not. For example, if the
output is set for “At Current” and the threshold for 100, drive current over
100% will activate the relay. If the user changes the output to “At Temp”, the
relay will deactivate (even if current > 100%) because the drive is cooler than
100 degrees C.
The following values can be annunciated
3. The relay changes state because a Digital Input link has been established and
the Input is closed.
Condition Description
At Speed The drive Output Frequency has equalled the commanded frequency
381
385
389 [Dig Out1 Level]
[Dig Out2 Level]
[Dig Out3 Level]
Sets the relay activation level for options 10 – 15
in [Digital Outx Sel]. Units are assumed to match
the above selection (i.e. “At Freq” = Hz, “At
Torque” = Amps).
Default:
Min/Max:
Units:
0.0
0.0
0.0/819.2
0.1
380
384
388
Value Description
At Freq The drive output frequency equals or exceeds the programmed Limit
At Current The drive total output current exceeds the programmed Limit
At Torque The drive output torque current component exceeds the programmed Limit
At Temp The drive operating temperature exceeds the programmed Limit
At Bus Volts The drive bus voltage exceeds the programmed Limit
At PI Error The drive Process PI Loop error exceeds the programmed Limit
Vector