Custom Scheme |
To support future EPC formats, click Custom Scheme on the Data Type dropdown list on the Encoder property page for both RFID and smart card encoder objects.
A scheme is a string that expresses the sizes (and sometimes the data) of the fields in the data stream. Field sizes are measured in bits, and fields are separated with semicolons. If the data for a particular field should always be the same when initially programmed, then a colon should follow the field size, and the mandatory data should follow the colon.
For example, "8:8;10;32" describes a three-field scheme. The first field, the header, is 8 bits long and has an immediate value of 8 (this is a specification requirement and cannot be set by the user). The second field has 10 bits, and the third has 32 bits. Both of these values can be set by the user.
After you have created a custom scheme, you can add more data sources for each field that contains variable data by using the Encoder Properties dialog. Do not create a separate data source for any fields that contain constant data.
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