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  • PAD
    Junior Member
    • Dec 2023
    • 2
    #1

    Modbus in Zabbix

    Hello,
    I want to use modbus in Zabbix.
    For this purpose I installed zabbix_agent2.
    What settings should I make in zabbix_agent2.conf file and what in modbus.conf file.

    Currently I have configured modbus.conf like this

    Plugins.Modbus.Timeout
    Plugins.Modbus.Sessions.MB1.Endpoint=tcp://xxx.xxx.xxx.yyy:502 (xxx.xxx.xxx.yyy its modbus device address )
    Plugins.Modbus.Sessions.MB1.SlaveID=1
    Plugins.Modbus.Sessions.MB1.Timeout=10

    But I don't know what settings to put on zabbix_agent2.conf​
    Tags: None
    • Answer selected by PAD at 15-12-2023, 11:21.
      jeansieb
      Junior Member
      • Jan 2023
      • 3
      Originally posted by PAD
      I get an error message
      Testing
      root@zabbix01:/etc/zabbix# zabbix_agent2 --test "modbus.get[tcp://xxx.xxx.xxx.yyy:502,2,1,04100,1,,,1]" (xxx.xxx.xxx.yyy device IP)

      Answer
      modbus.get[tcp://xxx.xxx.xxx.yyy:502,2,1,04100,1,,,1][m|ZBX_NOTSUPPORTED] [Unable to read: read tcp xxx.xxx.xxx:56372->xxx.xxx.xxx.yyy:502: i/o timeout]
      (xxx.xxx.xxx Zabbix server IP)

      Where am I wrong​


      Also getting the same error.
      I can see with a tcpdump that the network packets are going back and forth between Zabbix and the host, but it seems like something is missing from Zabbix to understand what info is coming back.
        • Selected Answer

        Comment

        • PAD
          PAD commented
          15-12-2023, 11:20
          Editing a comment
          Do you have any idea where I need to adjust in Zabbix,
        • cyber
          Senior Member
          Zabbix Certified SpecialistZabbix Certified Professional
          • Dec 2006
          • 4807
          #2
          Make sure you have Include parameter in your agent2 config so your modbus conf will be included... nothing else, I think...

            Comment

            • PAD
              #2.1
              PAD commented
              13-12-2023, 17:39
              Editing a comment
              Thanks
              I had Include=/etc/zabbix/zabbix_agent2.d/*.conf
              Now it is Include=/etc/zabbix/zabbix_agent2.d/modbus.conf
            • PAD
              Junior Member
              • Dec 2023
              • 2
              #3
              I get an error message
              Testing
              root@zabbix01:/etc/zabbix# zabbix_agent2 --test "modbus.get[tcp://xxx.xxx.xxx.yyy:502,2,1,04100,1,,,1]" (xxx.xxx.xxx.yyy device IP)

              Answer
              modbus.get[tcp://xxx.xxx.xxx.yyy:502,2,1,04100,1,,,1][m|ZBX_NOTSUPPORTED] [Unable to read: read tcp xxx.xxx.xxx:56372->xxx.xxx.xxx.yyy:502: i/o timeout]
              (xxx.xxx.xxx Zabbix server IP)

              Where am I wrong​

                Comment

                • jeansieb
                  Junior Member
                  • Jan 2023
                  • 3
                  #4
                  Originally posted by PAD
                  I get an error message
                  Testing
                  root@zabbix01:/etc/zabbix# zabbix_agent2 --test "modbus.get[tcp://xxx.xxx.xxx.yyy:502,2,1,04100,1,,,1]" (xxx.xxx.xxx.yyy device IP)

                  Answer
                  modbus.get[tcp://xxx.xxx.xxx.yyy:502,2,1,04100,1,,,1][m|ZBX_NOTSUPPORTED] [Unable to read: read tcp xxx.xxx.xxx:56372->xxx.xxx.xxx.yyy:502: i/o timeout]
                  (xxx.xxx.xxx Zabbix server IP)

                  Where am I wrong​


                  Also getting the same error.
                  I can see with a tcpdump that the network packets are going back and forth between Zabbix and the host, but it seems like something is missing from Zabbix to understand what info is coming back.
                    • Selected Answer

                    Comment

                    • PAD
                      #4.1
                      PAD commented
                      15-12-2023, 11:20
                      Editing a comment
                      Do you have any idea where I need to adjust in Zabbix,
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