When the execution result is 0, #L_CalcZero turns on.
If an overflow results from the rotation instruction, the overflowed bit is stored in #L_CalcCarry.
When the execution results in an error, the error information is stored in #L_Status.
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
ROL
When a positive transition instruction turns ON, the ROL instruction is executed. When the ROL instruction is executed, the result of rotating 1 bit is stored in D1.
When using a normally open instruction, the ROL instruction is always executed as long as the normally open bit is ON.
ROLP
The ROLP and ROL instructions have different ways of detecting when to execute. In the ROLP instruction, even when using a normally open instruction, only the upward transition of the bit is detected, and the ROLP instruction is executed. Even if the bit of the normally open instruction remains ON, the ROL instruction is executed only for one scan.