There are 3 mathematical functions available: MATH 1, 2 and 3. There are 13 operations that can be used:

**Sum and difference:**sum and difference operations add or subtract the value of the Operand Factor A and Operand B, the result is the sum or the difference of the two values. If one of the two operands factors is in error, the result returns an error.**Average:**the average sums the values of operands factors A and B and then divides them by two. If one of the two operands factors is in error, the result returns an error.**Minimum and Maximum**: the lowest (minimum) or highest (maximum) value of operand factor A and B is reported as the result. If one of the two operands factors is in error, the result returns an error.**Min./Max. SIF.E.:**the lowest (minimum) or highest (maximum) value of operand factor A and B is reported as the result. If one of the operands factors is in error, the result returns the value of the other operand factor not in error.

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**Winter/Summer**: The value of operand factor A is returned as the result if the system is in Winter, while operand factor B is returned as the result if the system is in Summer. If one of the two operands factors is in error (even if it is not the one for the current season), the result returns an error.**MUX BOOL 1/2/3/4**: The MUX BOOL operator function results in what is read from operand factor A or operand B according to the result of the corresponding BOOL logic function. For example, in MATH2 let MUX BOOL 1 be used as an operation and operand factor A be a probe connected to REG IA5sensor TH 223, while operand factor B is a constant (=6045). If the result of logical function BOOL1 is 1, then the result of MATH2 is operand factor B, if the result of logical function BOOL1 is zero, then the result of MATH2 is operand factor A.**Backup**: returns the value of operand factor A in the result; if, however, the latter is in error, the value of operand factor B is returned.

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Mathematical functions can be called up anywhere in RegConfig where there are analogue inputs by selecting SPECIAL from the drop-down menu and then MATHx. An example of the use of a logic boolean function applied to the enable contact of a zone is also shown in the following image; in this case, from the drop-down menu, it is necessary to select VDoutH and then choose from the 4 logic functions according to the programming carried out on the Free Signals page:**PHOTO TBD**

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