Instruction Execution Status
You can check the error status with the system variable #L_ExIOSpParmErr (special I/O parameter error).
30.5.1.3 Special I/O System Variables
Enabling condition
While the instruction is in operation and when it is confirmed that the high-speed counter is being executed
While the instruction is in operation, when emergency stop request is detected and the instruction is stopped
If no error has occurred (refer to the following notes).
Disabling condition
When emergency stop request is executed and the stop is confirmed
*When disabled, the operand D1 is cleared to 0.
Notes
While executing the instruction, high-speed counter execution is monitored. If it is being executed, an error occurs and no process will be performed.
When the operand D1 cannot be recognized in the instruction, an error occurs.
When executing the instruction using the pulse (for example, PT instruction), you need to turn the instruction OFF and then turn it ON to execute it again.
When the instruction is executed, it will be in operation.
If the instruction is in operation, the instruction will be executed continuously regardless of the enabling/disabling condition.