ProSoft Technology PS-QS-1x10-0781 - Manual (Page 36)

FieldServer Configuration Manual Page 36 of 90
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5.4 Logic
Logic functions implement Boolean functions (True/False statements) of bit Data Array values. Single-operator logic can be incorporated into Moves, but
Multi-operator/operand logic must be defined in the Logic block
5.4.1 Logic as a Moves Function
The length of the Move defines the number of input operands. For binary operators [AND, OR] all operands are combined and a single output is produced. For
the unary operator [NOT] an output is produced for every input, and is stored in sequence starting at the output location.
5.4.2 Standalone Logic
The logic definition allows up to four source data locations, up to four logic operations, and one output data location. Operands are kept on a “stack” and are
operated on in the sequence in which they have been defined. Logic functions consume 1 or 2 stack variables as inputs (2 for AND, OR, and 1 for NOT) and
leave the output on the stack, ready to be used by the next defined logic operation. The output of each operation becomes an input to the next operation,
along with the next defined operand.
Fields Specific to the Logic Definition
DAI1...DAI4 :
input Data Arrays 1 through 4
DOI1...DOI4 : input Data Array offsets 1 through 4
DAO:
output Data Array
DOO: output Data Array offset
FN1...FN4: logic functions 1....4 (permitted values: And, Or, Not, - (no setting))
5.4.2.1 Logic Usage Example:
Logic
Task_Name , Scan_Interval , DAI1
, DOI1 , DAI2 , DOI2 , DAI3 , DOI3 , DAI4 , DOI4 , FN1 , FN2 , FN3 , FN4 , DAO , DOO
Task_105 , 1 , DA_1 , 0 , DA_2 , 1 , DA_3 , 2 , DA_4 , 3 , AND , OR , AND , NOT , DA_5 , 21
This definition will result in the following operation:
DA_5[21] = ~ ( ( ( DA_1[0] & DA_2[1] ) | DA_3[2] ) & DA_4[3] )