Class 1 Data Message Priorities; Led Objects - ABB RELION 620 Series Communication Protocol Manual

1MRS757647 C
3.3.2.5
3.3.2.6
620 series
Communication Protocol Manual

Class 1 data message priorities

1. User command responses (highest priority)
2. Class 1 change events
3. Disturbance file transfer messages
4. General interrogation data responses (lowest priority)
Disturbance file transfer increases the overall response time for Class 1 change events
on the IEC 60870-5-103 interface. The standard does not suggest any particular
priority division between these two message types. It is therefore possible to configure
the priority division between the Class 1 change events and disturbance file transfer
messages. There are three possible priority levels:
• Ev High: Class 1 change events has higher priority.
• Ev/DR Equal: Priority is equal between the two message types.
• DR High: Disturbance file transfer has higher priority.
The setting parameter for the priority level is located via Configuration/
Communication/IEC 60870-5-103/I3C0n/Class1Priority. Default level is Ev
High.

LED objects

The user-definable LHMI LED object is also visible as IEC 60870-5-103 Class 1 data.
In older IED versions, the LED object had only two positions: Off and Alarm (red).
The corresponding IEC 60870-5-103 Class1 LED data area shows DPI values off,
"01" for Off and values on, "10" for Alarm.
In the new LED versions, the IED LED objects can be configured to use several
options and colors. By default, the LED states are defined as Off, OK (green) and
Alarm (red). However, the color definition for the OK and Alarm states can be
configured.
Two IEC 60870-5-103 LED protocol data area alternatives are available depending on
how the LEDs are used.
Example 1
If the LEDs are configured to show two positions, for example Off-OK or Off-Alarm,
the LED object positions are visible in the digital input LED area 1 with DPI values
off "01" for Off and on "10" for OK or Alarm. This coding is the same as in the older
IED versions.
Example 2
If LEDs are configured to show all three positions or the two positions OK-Alarm,
LED area 2 can be used. LED area 2 data are by default configured to show all the
three possible LED state values in the extended DPI data octet. This resembles the
Vendor-specific implementation
Section 3
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