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IEC-103 relay events

IEC-103 is commonly used for protection relay communication. The evidence often looks like relay events, function information, and fault-related data instead of generic telecontrol points.

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What it means

IEC-103 relay events

IEC-103 is commonly used for protection relay communication. The evidence often looks like relay events, function information, and fault-related data instead of generic telecontrol points.

Reset linkThe master establishes a clean communication state.

Class pollingRelay data can appear through Class 1/Class 2 behavior.

Relay eventProtection information may include function and information numbers.

TimestampRelay-side event time matters for fault and sequence review.

What to check in ARIEC60870

Use the software to connect the explanation to the frame evidence.

1Do not expect IEC-103 evidence to look like IEC-101 IOA-based process values.

2Check function/information fields and relay timestamps carefully.

3ARIEC60870 helps make relay-side protocol evidence more readable.

TX10 49 01 4A 16request link status

RX10 0B 01 0C 16ACD=1, Class 1 waiting

TX10 7A 01 7B 16request Class 1 data

RX68 ... 16event or command confirmation

Keep following the evidence.

Protocol learning is easier when every concept is connected to a visible frame, counter, address, value, event, or report finding.

ACD/DFC Class 1/Class 2 Command