When the execution result is 0, #L_CalcZero turns on.
When the execution results in an error, the error code is stored in #L_CalcErrCode.
When checking the result using system variables, make sure the check takes place after the instruction has been executed. When checking the state after multiple instructions have been executed, system variables will store the result only of the last processed instruction.
Program Example
S2H
When the positive transition instruction turns ON, the S2H instruction will be executed. When the S2H instruction is executed, the result of the S2H conversion of Data_A is stored in D1.
When using normally open instruction, the S2H instruction is always executed as long as the normally open instruction variable remains ON.
S2HP
The S2HP and S2H instructions have different ways of detecting when to execute. In the S2HP instruction, only the upward transition is detected and the S2HP instruction is executed even when using a normally open instruction. Even if the normally open instruction variable remains ON, the S2HP instruction is executed only once (for 1 scan).