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error_indication [2018/12/12 15:17]
akuzmuk
error_indication [2019/01/08 09:07]
akuzmuk [Communication issues]
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 ===== 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 blinkHere is example:
- +
-Here is example of register that can't be read over built-in RS-485 port. +
  
 {{::rs485-issue.gif?nolink|}} {{::rs485-issue.gif?nolink|}}
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 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.