Default StrMap Functionality

The default configuration for the StrMap file is shown below. This configuration file allows integer to ASCII conversions for batch data transferred between AVEVA Batch Management with Foxboro DCS components and unit blocks. AVEVA Batch Management with Foxboro DCS components has five string items that can be downloaded to unit blocks on batch initiation. Additionally, there is one item that AVEVA Batch Management with Foxboro DCS components reads back in integer format (Status) that is converted to string format using the StrMap.txt file.

4Run

5Held

6Aborting

7Locking

8Locked

100OK

101NOT_OK

If StrMap conversions are not used, all the available string assignments for any particular unit block are used. Converting some of these parameters to integer values reduces the number of string allocations.

Integer values in this StrMap file cannot be duplicated. Each integer value can only be used one time in the StrMap file.

In the default StrMap configuration shown in the previous figure, the second, third, and fourth lines relate to batch Status. These values are dynamically downloaded to II0003 of the unit block at run time. Corresponding unit block assignments for all integer and string values must also be configured in the equipment system tag extensions of the TagMap file.

The last two lines in the StrMap file relate to status II0004. AVEVA Batch Management with Foxboro DCS components reads the unit block status word for an acceptable status prior to allocating the unit for a batch. The status word must be an integer for it to be automatically updated by the Foxboro DCS Object Manager on all AVEVA Batch Management with Foxboro DCS components displays.

If the status word is configured as a string, this automatic updating (for string values) does not take place. There is no limit to the number of status word assignment values that can be used. However, all the corresponding integer/ASCII combinations used must be specified in the StrMap file and also entered as Equipment statuses in the process model.