136   It is unclear what the procedure refers to in the test description for test case 7.6.3.2.20

Created: 23 Nov 2025

Status: Triage

Part: Part 100-1 (2018, Edition 1)

Links:

Page: 80

Clause: 7.6.3.2 Resiliency test cases

Paragraph: test case 7.6.3.2.20

Issue

The test description for test case 7.6.3.2.20 is "Reception of an unexpected ASDU(unsolicited or unexpected in this procedure)". It does not specify clearly what this procedure refers to. This procedure can be
a) Challenge and Reply procedure specified in §7.3.3.4 & §7.3.4.2 in IEC TS 62351-5:2013.
b) Steps 4) to 10) specified in §8.2 in IEC TS 60870-5-7:2013.

Proposal

Make it clear what this procedure in test description refers to.