the line also includes a second and a third field 114 116 field 114 is designed to receive the numerical value of the threshold sj field 116 is designed to receive a numerical value that defines a hysterisis that applies on this threshold value input in field 114 finally window 98 has a third area 120 that includes two fields 122 and 124 designed to receive numerical values that correspond to the time delays that delay lines 50 and 52 will implement respectively the operation of truck 2 and software 92 will now be described with reference to fig4 initially during a phase 130 an operator defines the mathematical operations to be executed by electronic module 20 at the beginning of phase 130 in step 132 the computer 80 is connected to electronic module 20 through adapter 76 wire 74 and plugs 72 70 thereafter in step 134 the operator selects in each zones 102 103 and 104 the operands to be used in the mathematical operation subsequently in step 136 the operator selects in zones 106 and 107 the operators to apply to the operands step 134 and 136 can be iterated for each mathematical operation to be executed by calculators 54 and 56 in step 138 using the field in area 110 the operator can also specifies the threshold values to be used by comparators 40 42 in step 140 the operator enters the time delay to be implemented by delay lines 50.