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The SOE collecting of events is performed by using the Tags described next, by using an ISOTCP communication with the PLC.

 

Block Tag for Control Register (Read-Only)

•B1: 0 (zero)

•B2: 391 (Data type = 3 × 100 + Data area = 91)

•B3: DB block number. If memory contains a single or unspecified DB block, fill it in with value 1 (one)

•B4: Not used

 

The Block Tag to query Control Registers must contain four Elements to return the following values:

•Element 1: Table status

•Element 2: Recording pointer

•Element 3: Acquisition status

•Element 4: Maximum limit of items on the circular buffer

 

For a description of each one of these Control Registers, please check topic Preparing for SOE Collecting.

 

Tag Block for Data Collecting (Read-Only)

•B1: 0 (zero)

•B2: Data type × 100 + Data area = 90

•B3: DB block number. If memory contains a single or unspecified DB block, fill it in with value 1 (one)

•B4: Not used

 

The Block Tag for Data Collecting must contain a number of Elements corresponding to the number of values of n-event type that compose a single event. If this event is composed of a single value, resize the Block Tag for Data Collecting with a single Element. If this event is composed by two values, the Block Tag must be resized to two Elements, and so on. Use Block Tag's B2 parameter to indicate a data type associated to event values.