* Question
| What are the possible software errors when the SF LED is lit? |
* Answer
| 1) The datetime interrupt is enabled and triggered, but the organization block OB10 is interrupted without loading the datetime. 2) The time-delay interrupt is triggered by SFC 32, but the time-delay interrupt organization block OB20 is not loaded. 3) The process interrupt (hardware interrupt) is enabled and triggered, but the hardware interrupt organization block OB40 is not loaded. 6) The slot of the DPV1 slave triggers a vendor-specific interrupt, but the corresponding organization block OB57 is not loaded. 7) Missing or faulty modules were accessed while updating the process image.In the above case, the CPU will call OB85. If the required error handling OB is not loaded, the CPU will switch to STOP mode.Date and time interrupts should be disabled before setting the real-time clock with SFC 29. 8) The cycle time is exceeded because too many interrupt OBs are called at the same time.The CPU will call OB80 and if OB80 is not loaded, the CPU will switch to STOP mode. 9) Programming error: unloaded block, block number error, timer/counter number error, read/write access to error area, etc.The CPU will call OB121 and the programming error should be eliminated. 10) I/O access error, an error occurred while accessing the module data, the CPU will call OB122. |
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