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IO Server redundancy behaviour and syslog related query

Rohan

With my redundant IO Server,

I monitored back to back trace entry for my modbus device's PORT in Standby SCADA's IOserver syslog,

2020-07-08 19:20:50:2050 +05:30 [TRACE] [CORE       ] [0x2b18] [IOServer        ] [(GLOBAL)        ] [InitChannel()                                     ] [plc_drv.cpp                   ] [1272] Channel nPort_009_S is Online
2020-07-08 19:21:20:2120 +05:30 [TRACE] [CORE       ] [0x2b18] [IOServer        ] [(GLOBAL)        ] [InitChannel()                                     ] [plc_drv.cpp                   ] [1272] Channel nPort_009_S is Online
2020-07-08 19:20:20:2020 +05:30 [TRACE] [CORE       ] [0x2b18] [IOServer        ] [(GLOBAL)        ] [InitChannel()                                     ] [plc_drv.cpp                   ] [1272] Channel nPort_009_S is Online
2020-07-08 19:20:50:2050 +05:30 [TRACE] [CORE       ] [0x2b18] [IOServer        ] [(GLOBAL)        ] [InitChannel()                                     ] [plc_drv.cpp                   ] [1272] Channel nPort_009_S is Online
2020-07-08 19:21:20:2120 +05:30 [TRACE] [CORE       ] [0x2b18] [IOServer        ] [(GLOBAL)        ] [InitChannel()                                     ] [plc_drv.cpp                   ] [1272] Channel nPort_009_S is Online

In this case my devices's communication is healthy all the time and no single entry found in Primary SCADA's IOserver syslog.

Can someone explain this behavior?

Primary SCADA Kernel,

Standby SCADA Kernel,

If this IODevice is connected to Primary SCADA Server then why error count in Driver windows increasing?

Why Unit status is offline in Standby instead of Standby?

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  • Sorry Bas,
    It was my mistake.

    Please check the screenshot again.
    My device have single modbus card in controller.
    Here with our series device we are using Nport 5130A as device server and using this device encapsulation and maximum allowed connection properties we have achieved the redundancy.
    But my question is why standby syslog.IOServer is logging PORT ONLINE TRACE and Unit status is offline in Standby instead of Standby?
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  • Sorry Bas,
    It was my mistake.

    Please check the screenshot again.
    My device have single modbus card in controller.
    Here with our series device we are using Nport 5130A as device server and using this device encapsulation and maximum allowed connection properties we have achieved the redundancy.
    But my question is why standby syslog.IOServer is logging PORT ONLINE TRACE and Unit status is offline in Standby instead of Standby?
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