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

    Issue
    %SW125 contains Stop codes, what to the different numbers mean?

    Product line
    Unity Pro, M340

    Resolution 
    %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.
    Restarting of the Application after a Blocking Error
            • 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.
    Blocking Error Diagnosis
            • 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

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