Instruction Status
You can check the error status with the system variable #L_ExIOSpParmErr (special I/O parameter error).
31.5.1.3 Special I/O System Variables
Enabling condition
When the Power Flow is ON
Disabling condition
When the Power Flow is OFF
Notes
Only the emergency stop request is notified to the PWM instruction. The stop control of the PWM output is performed with the PWM instruction.