Serial - Related information

• Modbus rtu485 communication problem

  A HMI connects four PLC with the same parameters (19200, N, 8, 2) through COM2 port RTU485. Because it is one-to-many, I use for loop to traverse four PLC to read variables. You only need to set the station number. by monitoring a second variable insi...

  Serial port

  Jun.28,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b38816-2c0ff.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b38816-2c0ff.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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