Roboticsware Support

The following are the most common cases of connecting from our products to Mitsubishi Electric's Melsec Q series via Ethernet.

• In the configuration of our product, the port number is set in decimal. On the other hand, when using GX-Developer, the port number is set in hexadecimal, but it is still set in decimal.
• The PLC has not been restarted after configuration with GX-Developer.
• You are trying to write to an address outside the range of addresses supported by the communication card (large address).
  *In the above case, the error code "0x4031" will be returned from the PLC.
• Write-protection is set on the PLC side.
• When connecting a PLC connected via Ethernet to other PLCs connected via MELSECNET, it is necessary to make settings for the folder in addition to the communication settings for the unit.If the connection test of the unit is OK but NG when you actually start communication, please review the communication settings of the folder. The parameters of the communication settings are as follows.
  1. Network number (specified in the range 00~FF, hexadecimal)
  2. PC number (specified in the range of 00~FF, hexadecimal)
  3. Request destination unit I/O number (specified in the range 0000~FFFF, hexadecimal)
     *Separate each item with "," (comma).
  Example.)
  00,FF,03FF
  *The default setting "00,FF,03FF" is fine for one-to-one connections. ("00,FF,03FF" means "own machine")