The structured text variables are divided into two distinct types:
1) The local variables that are declared in the Structured Text Program:

Figure 1: Declaration of local variables
2) Global variables are declared in Structured Text Variables:

Figure 2: Declaration of global variables
Note that in Figure 2 there are two variables declared differently:
| • | GLOBAL VARIABLE: unaddressed variable of the REAL type. |
| • | VARIABLE GLOBAL_MBUSS: variable with Modbuss address "0" of type REAL and with initial value 150. |