Values of the system word %SW125 for the M340 controller.

%SW125 M340

• • • • • Blocking errors, caused by the application program, do not cause system errors but prohibit execution of the program. When such an error occurs, the PLC stops immediately. (all tasks are stopped on the current instruction). The ERR LED flashes.

• • • • • To resolve this issue it is necessary to INIT the PLC or to set the %S0 bit to 1.
          The application is then in an initial state:
          - The data resumes its initial value.
          - Tasks are stopped at end of cycle.
          - The input image is refreshed.
          - Outputs are controlled in fallback position.
          The RUN command then allows the application to be restarted.

• • • • • Indication of a blocking error is signaled by the ERR and RUN LEDs flashing on the processor front panel. The nature of the error is indicated by the system word %SW125.

          The following table presents the errors signaled by the values of the system word %SW125.

           

          Hexadecimal Value of %SW125	Corresponding Error
          23	Execution of a CALL function towards an undefined subroutine
          0	Execution of an unknown function
          2258	Execution of the HALT instruction
          9690	Failure of the application CRC check (checksum)
          DEB0	Watchdog overrun
          2259	Execution flow different to the reference flow
          DE87	Calculation error on numbers with decimal points
          DEF0	Division by 0
          DEF1	Character string transfer error
          DEF2	Capacity exceeded
          DEF3	Index overrun
          DEF7	SFC execution error
          DEFE	SFC steps undefined
          81F4	SFC node incorrect
          82F4	SFC code inaccessible
          83F4	SFC work space inaccessible
          84F4	Too many initial SFC steps
          85F4	Too many active SFC steps
          86F4	SFC sequence code incorrect
          87F4	SFC code description incorrect
          88F4	SFC reference table incorrect
          89F4	SFC internal index calculation error
          8AF4	SFC step status not available
          8BF4	SFC memory too small after a change due to a download
          8CF4	Transition/action section inaccessible
          8DF4	SFC work space too small
          8EF4	Version of the SFC code older than the interpreter
          8FF4	Version of the SFC code more recent than the interpreter
          90F4	Poor description of a SFC object: NULL pointer
          91F4	Illegal action identifier
          92F4	Poor definition of the time for an action identifier
          93F4	Macro step cannot be found in the list of active steps for deactivation
          94F4	Overflow in the action table
          95F4	Overflow in the step activation/deactivation table