error_indication
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error_indication [2018/12/12 15:16] – akuzmuk | error_indication [2022/01/15 17:56] (current) – ↷ Links adapted because of a move operation 127.0.0.1 | ||
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====== Error indication ====== | ====== Error indication ====== | ||
- | In case of some problems | + | In case of some most common |
There are three such cases: | There are three such cases: | ||
Line 7: | Line 7: | ||
===== Missing SD card or SD card failure ===== | ===== Missing SD card or SD card failure ===== | ||
In case of any issue with SD card WebHMI three LEDs will blink slowly: ERR, WWW and VPN. Here is example: | In case of any issue with SD card WebHMI three LEDs will blink slowly: ERR, WWW and VPN. Here is example: | ||
- | {{:: | + | {{network: |
===== Input power issues ===== | ===== Input power issues ===== | ||
If input power voltage is below normal operational limit four LEDs will blink fast: PWR, ERR, WWW and VPN. Here is example: | If input power voltage is below normal operational limit four LEDs will blink fast: PWR, ERR, WWW and VPN. Here is example: | ||
- | {{:: | + | {{network: |
===== Communication issues ===== | ===== Communication issues ===== | ||
- | If any register can't be read over serial or Ethernet interfaces ERR led will blink, | + | If any register can't be read over serial or Ethernet interfaces ERR led will blink. Here is example: |
- | Here is example of register that can't be read over built-in RS-485 port. | + | {{network: |
- | + | ||
- | {{:: | + | |
In this example there is no response from PLC over built-in RS-485 port. You can see TX LED blinking when request sent and no RX LED activity. This means that WebHMI does not receive any response on these requests. | In this example there is no response from PLC over built-in RS-485 port. You can see TX LED blinking when request sent and no RX LED activity. This means that WebHMI does not receive any response on these requests. | ||
+ | If you have very short scan time and too many reading errors ERR led can light permanently w/o blinking. |
error_indication.1544627790.txt.gz · Last modified: 2018/12/12 15:16 by akuzmuk