The numeric processing system allows simple algebraic manipulation of data points to form a value to be written into a data point. This is used to perform calculations such as total injection voltage.

Just like the interlock tables, the numeric processor works off a chaining system. The data point to be affected is set in the NumList table.

The NumPoint table is used to perform the algebraic operations. The operations are peformed in order based on RecId. NPtype is used to define what algebraic function to perform (e.g. add, subtract, multipy, divide, sin, cos). A chain is started with an initial stored value of 0. The first record usually inserts an initial value using 'load' or 'add' as the NPtype. When a record is processed, the data point specified by NPdskey is multiplied by the Scale field to create the operand. If NPdskey is NULL, the Scale field is used as a constant operand in the calculation. Once the operand is determined, the operation specified by NPtype is evaluated on the stored value and operand. The result is placed in the stored value. This continues until all of the records in the chain have been processed. Once the chain has completed, the resulting stored value is written to the data point specified in NumList.

To facilitate complex algebraic equations, four subtotal values are available. They can be used by appending '_S#' to NPtype, where # is 1 through 4. Once the subtotal has been calculated, it can be evaluated into the main total using 't_add_S#', 't_sub_S#', 't_mul_S#', or 't_div_S#'. When the above evaluations are done with the main total, the subtotal is automatically cleared.