Danfoss MCO 305 Design Manual page 139

MCO 305 Design Guide
__ APOSS Tools __
SDO Curve
A curve can be added for any SDO that can be read from the controller.
There are three methods of recording the data for the curve: as a "polled" value, through a "Free Run"
group curve, and through a "Single Shot" group curve. "Free Run" groups can only be used in the Free Run
Oscilloscope and "Single Shot" groups can only be used in the Single Shot Oscilloscope. Recording the data
through a group curve is the preferred method since this greatly reduces the utilization of both the control-
ler processor and the communications network.
Polled value - When an oscilloscope run is started, the Oscilloscope will regularly "poll" the SDO by sending
an "SDO read request" to the controller. Polled SDO curves will be added to the "Curve Selection List" under
the "Other Curves" heading.
Free Run group - When an oscilloscope run is started, all SDO's in the group will be configured into a single
PDO message. The controller will then automatically assemble and send the PDO message to the Oscillo-
scope on a regular cycle. These SDO curves will be added to the "Curve Selection List" under the associated
group heading.
Single Shot group - When an oscilloscope run is started, all SDO's in the group will be configured into a
TESTSETP array. When the run ends, the Oscilloscope will upload the TESTSETP array and extract the SDO
data. These SDO curves will be added to the "Curve Selection List" under the associated group heading.
Controller
This is the controller that will be associated with the curve. If a polled curve is being added, then the user
will be able to select a different controller for the curve. Each polled curve can be associated with a different
controller. If the curve is being added to a group, then the curve must be associated with the controller that
the group is associated with.
Group
The SDO can either be polled or added to an existing group. If more than one group exists, then the user
will be able to select the group to which the SDO is to be added.
SDO list
Use this list to → Select the SDO of interest.
Specify SDO
If the SDO cannot be found in the SDO list, then clicking this checkbox will allow the user to specify the
exact SDO index and subindex. The SDO index can be specified in either decimal (e.g. 9472) or hexa-
decimal (e.g. 0x2500) notation.
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