HEIDENHAIN TNC 430 - Resuming program run after an interruption

HEIDENHAIN TNC 426, TNC 430 385
10.9 Entering Formulas Directly
or
1st step 10 squared = 100
2nd step 3 to the powers 3 = 27
3rd step 100 – 27 = 73
Distributive law
for calculating with parentheses
a * (b + c) = a * b + a * c
Programming example
Calculate an angle with arc tangent as opposite side (Q12) and
adjacent side (Q13); then store in Q25.
To select the formula entering function, press the Q
key and FORMULA soft key.
Enter the parameter number.
Shift the soft-key row and select the arc tangent
function.
Shift the soft-key row and open the parentheses.
Enter Q parameter number 12.
Select division.
Enter Q parameter number 13.
Close parentheses and conclude formula entry.
Example NC block
13 Q2 = SQ 10 - 3^3 = 73
Parameter number for result?
37 Q25 = ATAN (Q12/Q13)
25
12
13