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| HOW TO CHECK FOR ERROR USING THE LEDS | |
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| LED Status |
| Cause |
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L. RUN | SD | RD | L. ERR |
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" | # | # | # | Normal communication is made but CRC error has occurred due to noise. |
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" | # | # | $ | Normal communication |
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" | # | $ | # | Hardware fault |
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" | # | $ | $ | Hardware fault |
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" | $ | # | # | Cannot answer due to CRC error of receive data. |
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" | $ | # | $ | Data sent to the host station does not reach destination. |
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" | $ | $ | # | Hardware fault |
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" | $ | $ | $ | Hardware fault |
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$ | # | # | # | Polling response is made but refresh receive is in CRC error. |
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$ | # | # | $ | Hardware fault |
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$ | # | $ | # | Hardware fault |
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$ | # | $ | $ | Hardware fault |
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$ | $ | # | # | Data sent to the host station is in CRC error. |
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$ | $ | # | $ | There is no data sent to the host station, or data sent to the host station cannot be |
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received due to noise. |
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$ | $ | $ | # | Hardware fault |
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$ | $ | $ | $ | Cannot receive data due to open cable, etc. |
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$ | $ | # $ | " | Invalid baud rate or station number setting |
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" | # | # | # | Baud rate or station number changed during operation. |
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$ | $ | $ | " | WDT error occurrence (hardware fault), power off, power supply failure |
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": On, $: Off, #: Flicker
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