Automatic control function programming manual ladder language

4.5.5 Order of Evaluation of the Expressions
Literal Elements of Ladder Language
In an expression, the highest priority operations are executed before the lower priority operations.
Operations with the same priority are executed from left to right.
Brackets are used to modify the order of evaluation of the expressions by forcing evaluation of the expression in
brackets first.
4.5.6 Immediate Integers
Immediate integers are limited to 32 bits.
The system considers integers to be signed. Bit 31 is the sign bit.
An immediate integer must be between:
Type Value
Negative hexadecimal integer from -2147483648 to -1
Negative hexadecimal integer from 0x80000000 to 0xFFFFFFFF
Positive decimal integer from 0 to 2147483647
Positive hexadecimal integer from 0x0 to 0x7FFFFFFF
4.5.7 Propagation of Variables - Format of Internal Calculations
The system considers all variables to be signed.
Byte Variables
Bit 7 is the sign bit. -128