Equipment Description
LED Description | The following table describes behaviors of the LEDs: | ||||
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Relay Contact | Orange | On | An Output signal is being sent. | ||
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24 VDC | Green |
| On | 24 V DC operating voltage present | |
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| Not illuminated | Off | No operating voltage | |
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RUN | Green |
| On | Normal state of PES (RUN) A loader user program is executed (not in | |
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| remote I/O modules). The CPU reads inputs, processes the logic, and |
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| writes outputs; communication and hardware/software tests are |
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| carried out. |
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| Green |
| Flash | The CPU is in STOP and is not executing any user program. All outputs |
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| are reset to a safe |
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| setting the Emergency stop system variable to TRUE in the user |
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| program or by a direct command from the PC. Seen when PLC is |
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| switched on for approximately 10s during the system check. |
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| Not illuminated | Off | The CPU in ERROR STOP (see ERROR below). | |
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ERROR | Red |
| On | The CPU has discovered a hardware fault in the CPU and is switching | |
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| to ERROR STOP. The CPU has discovered a software error in the |
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| operating system. The watchdog has triggered ERROR STOP, |
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| because the cycle time has been exceeded. The CPU has stopped the |
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| execution of the user program, ended all hardware and software tests, |
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| and all outputs have been reset. The CPU can only be started again |
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| through a command from the PC. |
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| Not illuminated | Off | No error has been detected. | |
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PROG | Orange | On | The CPU is being loaded with a new configuration. | ||
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| Orange | Flash | The Flash ROM is being loaded with a new operating system. | |
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| Not illuminated | Off | No loading of configuration or operating system. | |
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FORCE | Not illuminated | Off | FORCE is not signalled. | ||
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| Orange | On | Forcing active. | |
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FAULT | Orange | On | Error display for Line Control. The user program has caused an error. | ||
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| The PES configuration is faulty. The loading of a new operating system |
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| was faulty, and the operating system is corrupt. |
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| Orange | Flash | An error has occured during the write cycle for a Flash ROM (during | |
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| the oprating system update). One or more I/O errors have occured. |
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| Not illuminated | Off | None of the above errors has occured. | |
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OSL | Orange | Flash | Emergency loader of the operating system is active. | ||
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BL | Orange | Flash | COM in INIT_FAIL state. | ||
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33003405 07/2007 | 45 |
