Panasonic FP Series Programming Manual page 225

Conversion instructions
Body The input_value of the data type DINT is converted into STRING[11]. The converted value is
written to result_string. When the variable input_value = 12345678, result_string shows '
12345678'.
LD
ST When programming with structured text, enter the following:
result_string:=UDINT_TO_STRING(input_value);
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