Diagnostics and Commands

In addition to the diagnostic variables described in "Devices" section, the IEC 60870-5-104 device also has the following diagnostic variables:

• RecvCounter: received messages counter
• SentCounter: sent messages counter

Variables with the Run prefix allow you to manually start the execution of application commands of the IEC 60870-5-5 standard. To do this, you need to write any value to the corresponding variable. The following variables are defined in the device:

• RunGeneralInterrogation: initializes general interrogation of the station. The command is executed with the qualifier of QOI = 20 (station interrogation)
• RunCounterInterrogation: initializes counter interrogation. The command is executed with the qualifier of QCC = 5 (general group of counters)
• RunFreezeCounters: initializes the counter freeze command. The command is executed with the qualifier of QCC = 69 (freeze for general group of counters)
• RunFreezeResetCounters: initializes the counter freeze and reset command. The command is executed with the qualifier of QCC = 133 (freeze and reset for general group of counters)
• RunResetCounters: initializes the counter reset command. The command is executed with the qualifier of QCC = 197 (reset for the general group of counters)
• RunTestProcedure: initializes the testing command (TEST-FR)
• RunTimeSync: initializes the time synchronization command

For application commands to be initialized by the OPC UA client, the following conditions must be met:

• the access level to the properties of the OPC UA server objects must be Read / Write. You can read more about this here.
• the user must have the Run Command rights from the Devices category. You can read more about this here.