Dynagraph Card Data Group

The Modbus Pickford EIE "Dynagraph Card" (DynaCard) data group enables the retrieval of dynagraph card data. The XML of each "Dynagraph Card" data group contains a number of data group elements and a number of card blocks. The DataGroupElement elements define data used by CygNet. Your specific needs dictate how you implement this data group.

The Modbus Pickford EIE "Dynagraph Card" data group supports three card types. Each type and its associated ordinal number are:

• 0 — Current Card: Specifies the most recent stroke.
• 1 — Shutdown Card: Specifies a card when a normal pump-off is detected.
• 2 — Pumpup Card: Specifies a card when a unit starts again after having "pumped up".

This data group is required if you are connecting a device to the CygNet Dynagraph Viewer client application.

Stroke Length

The DynaCard data group is an "embeddedComposite" type, allowing it to get a manually entered stroke length from the StrkLenMan data group.

The driver sets StrokeLen in the DynaCard transaction in this manner:

1. Uses the value from DStrokeLen from the card header, if the DEID exists in the device template file and the value from the device is > 0.

2. If DStrokeLen is not in the data group, or has a value of 0, use the value from MStrokeLen, which is set using the StrkLenMan data group.

3. Fails the message if neither value is available.

Legacy LOWIS Logic

The optional attribute "LOWISMAXBUFFERCARDS" can be added to the data group in the device template file and set to a value of 8 to mimic the LOWIS buffer card retrieval logic.